Filimi yo gupfunyika, izwi kandi nka firime yo gupfunyika n'iy'ubushyuhe, yakozwe bwa mbere mu Bushinwa hakoreshejwe PVC nk'ibikoresho by'ibanze na DOA nk'iy'ibumba n'ingaruka zo kwifata za firime yo gupfunyika ya PVC. Bitewe n'ibibazo by'ibidukikije, ibiciro bihenze (ugereranyije na PE, ahantu hanini ho gupakira kuri buri gikoresho) no kudapfunyika neza, firime yo gupfunyika ya PE yagabanutse ubwo umusaruro wo mu gihugu watangiraga mu 1994-1995. Ibikoresho by'ibanze ahanini ni LLDPE, harimo C4, C6, C8 na metallocene PE (MPE).
Ibiranga
Ikorwa hakoreshejwe uburyo bwa LLDPE resin na tackifier special additives proportional formula, kandi ishobora gukora filime nyinshi zo kuzunguruka ku ntoki, imashini yo mu bwoko bwa resistance, imashini yo mu bwoko bwa pre-stretch, irwanya UV, irwanya static na anti-rust. Ifite ibyiza bikurikira:
1. Hakoreshejwe ibikoresho byo gusohora ibikoresho bifite ibyiciro bibiri, firime ikoreshwa mu gufunga ishobora kongera imiterere ya buri polimeri, ubwiza bwayo, imbaraga zayo zo gukurura, no kudapfundika kw'ibyinjira, ikagera ku rwego rwiza aho ishongesha.
2. Ifite ubushobozi bwo gukurura neza, ibonerana neza, kandi ifite ubugari bumwe.
3. Ifite uburebure burambuye, irakomera, iramira amarira mu buryo butambitse, kandi ifite ubushobozi bwo kwifata neza.
4. Ni ibikoresho bibungabunga ibidukikije bishobora kongera gukoreshwa, nta buryohe bwabyo, ntabwo ari uburozi, bishobora gupfunyikwa mu buryo butaziguye.
5. ishobora gukora ibintu bifatanye n'uruhande rumwe, ikagabanya urusaku ruturuka mu gihe cyo gupfunyika no kwaguka, ikagabanya ivumbi n'umucanga mu gihe cyo gutwara no kubika.
Porogaramu
1. Ipaki ifunze neza
Ubwo bwoko bw'ipaki bumeze nk'ipaki ya shrink film, aho firime izingira ku ipantalo kugira ngo ipfunyike byose, hanyuma ibikoresho bibiri bishyushya bikinga firime ku mpera zombi. Ubu ni bwo buryo bwa mbere bwo gupfunyika firime bwakoreshejwe kandi bwatumye habaho ubundi buryo bwinshi bwo gupfunyika.
2. Ubugari bwose bwo gupfunyika
Ubwo bwoko bw'ipaki busaba ko agapfunyika kaba kanini bihagije kugira ngo gapfuke agapfunyika, gafite imiterere isanzwe, bityo kakagombye gukoreshwa gafite ubugari bwa gapfunyika buri hagati ya 17 na 35μm.
3. Gupfunyika n'intoki
Ubwo bwoko bw'ipaki ni bwo buryo bworoshye bwo gupfunyika firime, ipakiye ku gipangu cyangwa ifashwe n'intoki, hakoreshejwe ipaki cyangwa ipaki ikikije ipaki. Ikoreshwa cyane cyane mu kongera gupfunyika firime zipfunyitse nyuma yo kwangirika, no gupfunyika firime isanzwe. Ubwo bwoko bw'ipaki bugenda buhoro kandi ubugari bukwiye bwa firime ni μm 15 kugeza 20.
