Choice of mechanical paint coatings

China Coatings Network
News:
to choose
coatings
the general principle is: must meet the application of products using environmental conditions and coating quality requirements.
coatings have four main roles: 1, protective role 2, decorative role 3, logo role 4, special role.The quality index of
coatings includes:
1, adhesion 2, paint gloss 3, paint color and brightness 4, coating cover force 5, coating's aesthetic performance 6, paint's fineness and viscosity 7, paint solid content 8, coating's chemical properties 9, coating's special performance 10, paint economy.
need to be explained is that the adhesion level of the coating is different, the quality of the coating is different, the performance of the coating film is also different. The higher the adhesion level of the coating, the higher the quality of the coating.
content of the coating refers to the non-volatile content of the coating parts.
:
1, primer selection
the bottom coating must have a strong adhesion to metal or other material surfaces and the upper coating has a good binding force. The role of the bottom coating in addition to the excellent performance of the coating itself to ensure, but also must have excellent pre-treatment quality to ensure.
2, the choice of intermediate paint
for decorative requirements of high or high protective requirements of the product coating or due to the material surface flatness is not enough to require a certain degree of decorative and protective coating, all need to use intermediate coating.The intermediate coating in the coating production has the function of carrying the upper and lower.
3, the choice of paint
surface coating on the coating requirements should have excellent resistance to a variety of external corrosion performance, have a certain physical and physical properties or special performance. Surface coating should not only protect the surface of the product from external corrosion and mechanical and man-made impact collision. Also requires a colorful, shiny plump. High solid sub-coats, electrophoresis coatings
powder coatings
are low-polluting coatings.
the current development of high decoration high protection, low toxicity and low pollution, has a special role, art-type and other types of paint production, is the general direction of future paint development.
coatings must meet the requirements of their respective products. However, the quality of the surface treatment before coating is one of the three elements of obtaining good coating quality. Pre-coating surface quality treatment is critical. At the same time, the matching between coatings is also a very important principle.
coating layer and coating thickness, the requirements for coating modulation are: the viscosity of the bottom and middle layer coating should be small, coating should be adjusted at any time, to ensure that it is always thin coating; The surface coating should be adjusted to the specified viscosity, generally slightly larger than the bottom and middle layer.