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铝卷成卷前的处理工作是怎样的?

来源:http://www.jndclyyxgs.com  发布时间:2020-11-03 14:55:37  

铝卷在成卷之前,需求做一些预处理工段,以保证铝卷表面的干净。免得其表面存在残留的油脂及光滑剂,对涂装及运用发生影响。所以,铝卷在成型前要对它进行下面几个方面的预处理。
Before the aluminum coil is rolled, some pretreatment sections are needed to ensure the surface of aluminum coil is clean. In order to avoid the existence of residual grease and smooth agent on the surface of the coating and application. Therefore, the aluminum coil should be pretreated in the following aspects before forming.
首先,不妨运用热水对铝卷进行洗刷。热水洗刷主若是将基板表面残留的脱脂剂洗刷干净,保证这些残留物能溶解当中,以防这些脱脂剂对基板形成二次污染。运用方式多为浸洗和喷淋刷洗的方式。所用水质硬度不要很高,不然,水中的矿物质会在基板表面生成矿斑。
First of all, may as well use hot water to wash the aluminum roll. Hot water scrubbing is mainly to clean the residual degreaser on the surface of the substrate to ensure that these residues can be dissolved, so as to prevent the secondary pollution of these degreasers on the substrate. The application methods are mostly immersion and spray brushing. The hardness of the water used should not be very high, otherwise, minerals in the water will form mineral spots on the surface of the substrate.
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其次,热碱脱脂由于预涂线线速较快,所以所用的脱脂剂通常浓度较高,典型的脱脂剂含有氢氧化钠(NaOH)、碳酸钠(Na2Co3)、水玻璃(Na2SiO3)、磷酸盐等组份。热碱脱脂工序通常分两步处理以确保铝卷基板表面洗刷干净,且多用喷淋刷洗的方式。
Secondly, due to the fast linear speed of precoating line, the degreasing agent usually has a high concentration. The typical degreasing agent contains sodium hydroxide (NaOH), sodium carbonate (Na2CO3), sodium silicate (Na2SiO3), phosphate and other components. The hot alkali degreasing process is usually divided into two steps to ensure that the surface of aluminum coil substrate is washed clean, and spray brushing is often used.

 

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再次,对它进行钝化处理。钝化处理是经过加压喷淋、浸涂或辊涂等方式使钝化剂在基材表面形成转化膜。通常运用加压喷淋的方式,钝化液在运用过程中发生的泥渣往往会拥塞喷孔,从而影响喷淋得功效。浸涂的方式尽管处理了这一问题,但钝化液的打发量较大。以上两种方式在本质操纵中都需求用水清洗有余的钝化液,就会发生废水的收回和净化问题,辊涂是好的钝化施工方式,拥有涂布平均、经济适用、不需淋洗等优势。铝板通常选用铬酸盐/氧化物型处理剂,该类处理剂含有铬酸盐、铬酸、磷酸及促成剂氟化物和钼酸盐。该类处理剂一定加入磷酸,不然就不能用来处理食物和饮料用铝板。
Thirdly, it is passivated. Passivation is to form conversion film on the surface of substrate by pressure spray, dip coating or roller coating. Usually using the way of pressurized spray, the sludge produced in the process of passivation liquid often congests the spray hole, thus affecting the efficiency of spray. Although the dip coating method can deal with this problem, the amount of passivation solution is large. Both of the above two methods require water to clean the excess passivation liquid in the essential operation, which will lead to the recovery and purification of wastewater. Roller coating is a good passivation construction method, with the advantages of average coating, economic applicability and no need of washing. Chromate / oxide type treatment agent is usually used for aluminum plate, which contains chromate, chromic acid, phosphoric acid and promoters fluoride and molybdate. Phosphoric acid must be added to this kind of treatment agent, otherwise it can not be used to treat aluminum plate for food and beverage.
从悉数市场状况来看,人们对与高端产物的需求仍然在不停增添的,相当抵制哪些冒充伪劣产物,而铝卷也将会成为咱们所需产物的一部分,是它让咱们的产物更美丽、更高级。铝卷在电子、包装、建筑、机械等方面得到了管饭的使用。将来的发展中铝卷还可以占据一部分市场的,铝卷制作厂家也会逐步增多,产物的竞争到会归结为技艺竞争和品牌竞争。
From all the market conditions, people's demand for high-end products is still increasing. We are quite resistant to fake and inferior products. Aluminum coil will also become a part of the products we need, which makes our products more beautiful and more advanced. Aluminum coil has been used in electronics, packaging, construction, machinery and other aspects. In the future development, aluminum coil can still occupy a part of the market, and the number of aluminum coil manufacturers will gradually increase. The competition of products will come down to the competition of skills and brands.