Selection principles for automotive putty construction
所具有的配套性要求使选用腻子的工作更为重要。 There are many types of car putty with different functions, and the matching requirements of coatingmake the work of putting putty more important.
The matching problem of putty with primer and topcoat is essentially the problem of matching polarity.
Generally speaking, a material with a higher polarity has a larger binding force, and a molecule with a lower polarity has a smaller binding force. Among them, the polarity of synthetic resin coatings (such as amino and epoxy primer, putty, topcoat, etc.) is large, while the polarity of oil-based coatings (such as grease, phenolic primer, putty, and paint) is Small, there is another type of coating (such as alkyd primer, putty, topcoat, etc.) the polarity is between the first two.
如下： Theputty are as follows:
1) Consider the compatibility of the coating from its low polarity. Generally, the polarity between the primer, putty and topcoat should be similar or basically similar, so as to obtain reliable adhesion and interlayer bonding.
2) Consider the selected putty according to the thickness and use of the filling layer, which are generally divided into filling type, intermediate type and scrape (spray) coating type. 构件的接缝等。 Filling putty is suitable for filling large depressions on the surface of components or seams of no deformation after drying , but poor stackability. Intermediate putty M Jinghe makes the other half of the time when open, the performance is in between. 会使构件表面达到平滑、匀顺、细致的目的。 If the putty is selected properly, the surface of the component will be smooth, smooth and meticulous. 涂装面漆后能使漆面丰满、光泽突出。 After the middle-coat eye is applied, the paint can be plump and shiny.components. 高、堆积性好，并且一次可刮较厚的涂层。 This type of putty high , good stackability, and can scrape thicker coatings at one time. The scraping (spraying) type putty is suitable for covering small irregularities on the surface of road marks, trachoma and components. This type of putty has the characteristics of fine particles, good flexibility, easy sanding and
3) Select putty according to different models.
Most domestic buses use homemade oily putty. 多采用双组分原子灰，如“新劲”牌原子灰、本全风集点 幼滑原子灰、纤维原子灰、金属原子灰、合送立 金原子灰、ICIP551-1050原子灰、P551- 1052原子灰（万能原子灰）、P551-l059原子灰、PPG的A656/663多用途聚酯原子灰、A659轻型聚酯腻子、A661 聚酯腻子、A662/A668聚酯喷灰、“鹦鹉”牌839-20多用途原子灰以及“杜邦”、“关西”原子灰等。Medium- , high-end, or imported vehicles mostly use two-component atomic ash , such as " Xinjin" brand atomic ash, local full-sliding atomic ash, fiber atomic ash , metal atomic ash , combined delivery gold atomic ash, ICIP551 -1050 atomic ash, P551-1052 atomic ash (universal atomic ash ), P551-l059 atomic ash, P656's A656 / 663 multi-purpose polyester atomic ash, A659 light polyester putty, A661 polyester putty, A662 / A668 poly Ester spray, "Parrot" brand 839-20 multi-purpose atomic ash and "DuPont", "Kansai" atomic ash, etc.
Due to the poor adhesion of the coating film on the surface of the coated object or the undercoating layer, scraping the coating film with nails or metal will cause the phenomenon of coating film peeling, which is called peeling. Car paint is easy to peel off ...