Defo prensipal yo nan woulo liv jumbo papye aliminyòm yo se:

Defo prensipal yo nan woulo liv jumbo papye aliminyòm yo se:

(1) Pinhole. Pinholes are the main defect of aluminium foil jumbo roll. In the raw material, on the roll, in the rolling oil, and even the dust in the air reaches about 6μm and enters the roll gap, it will cause pinholes. Therefore, it is impossible for 6μm aluminium foil jumbo roll to have no pinholes. It can only be evaluated by how much and its size. Due to the improvement of aluminium foil jumbo roll rolling conditions, especially the effective filtration of dust and rolling oil and the setting of convenient roll changing system, the number of pinholes in aluminium foil jumbo roll is more and more dependent on the metallurgical quality of raw materials and processing defects. It is difficult to find the corresponding relationship with the original defect when the defect of the raw material falls off. It is generally believed that pinholes are mainly related to gas content, inclusions, compounds and composition segregation. Effective aluminum liquid purification, filtration, and grain refinement can help reduce pinholes. Of course, the use of alloying and other means to improve the hardening characteristics of the material also helps to reduce pinholes. The pinholes of 6μm aluminium foil jumbo roll rolled from high-quality hot-rolled materials can be less than 100/㎡. When the casting and rolling materials are well purified, the pinholes of 6μm aluminium foil jumbo roll are below 200/㎡. In the aluminium foil jumbo roll rolling process, there are many other factors that cause pinholes, even catastrophic, and thousands of pinholes per square meter are not uncommon. Effective filtration of rolling oil, short-term replacement of rolls and dust-proof measures are all necessary conditions to reduce pinholes in aluminium foil jumbo roll, and the use of large rolling force and small tension rolling will also help to reduce pinholes.

(2) Woule mak, woule je, ekla inegal. Li se sitou papye aliminyòm defo woulo liv la ki te koze pa woulo liv la, ki divize an twa kalite: pwen, liy ak sifas. Karakteristik ki pi remakab parèt nan twa sik. Rezon prensipal yo pou defo sa a se: kòrèk fanm k'ap pile nan woulo yo; domaj nan woulo yo pa objè etranje: defo fèk ap rantre anprint woulo yo; woule fatig; enpak ant woulo, glisman, elatriye Tout faktè ki ka lakòz domaj nan sifas la nan woulo liv la ka lakòz mal nan woule nan woulo liv aliminyòm papye jumbo. Paske fini sifas aliminyòm papye jumbo woulo liv woule woulo liv la trè wo, ti tay inegal gloss pral afekte kondisyon sifas li yo tou. Netwayaj regilye nan moulen an woule, kenbe moulen nan woule pwòp, asire operasyon an nòmal nan cleaner a woulo liv, chanjman regilye woulo liv, ak fanm k'ap pile rezonab se kondisyon debaz yo asire sifas la inifòm nan woulo liv la jumbo papye aliminyòm apre woule.