There are many components that make up a single coating:
．Adhesives are dispersed with organic or inorganic functional particles. , such as colored or light-blocking pigments, light-sensitive silver halides , magnetic iron or complex grains
．A solvent that dissolves or suspends components.
．Supplements, such as surfactants and dispersants as coating aids, plasticizers to increase flexibility, preservatives to inhibit bacterial growth, cross-linking agents to enhance toughness or solubility, conductive materials to reduce static electricity
．grains on the surface. , for f to control reflection or to give a rough surface to prevent bonding or bonding of adjacent coatings.
The composition of the final product can be single layer or 9 layers or even more layers. The viscose coating of a certain book consists of 1 dozen layers. Paint (Shan paint) often consists of Ni pre-coat plus I.. One to two layers of the upper layer. The surface treatment of the car usually has one layer:
Coat, color layer, ten layers of finish. Photographic films have a more complex structure of layers (Cohen, 1990). For example, a secondary image of Polaroid film, including top and bottom) counties of support. In the middle there is a photosensitive layer of primary colors (blue, green, red), a timing layer, and a receiving layer for displaying images through a transparent top support. Polyester film supports the bottom coating and increases the adhesion of the photosensitive layer, and the bottom supports the ink coating . Regardless of whether the coating layer has one or more layers, some will form a continuous coating that covers the entire support, or form a discontinuous coating that only covers a part of the support.
We can divide the coating solution into two basic types.
1. The coated material is manufactured or sold as an end product. Examples of such coatings include:
．Painting of cars, houses, machines
．professional or amateur color film
．medical x-ray film
．Film for printed books and newspapers
．Copy paper coating
．Food packaging materials such as milk cartons
．Magnetic storage materials for computers, audio and video
．CD-ROM for data storage and recording
．Various self-adhesive tapes
．frame paper
2. In the process of product manufacturing, coating is an important part of the core technology for manufacturers to manufacture some equipment or equipment components.
Or coating products in the selection process is the key intermediate link. Examples of such products include·
．Photoresists for manufacturing computer, radio, and TV printed circuit boards
．Coating products for connecting components in circuit boards
．For example, in aircraft manufacturing, the coating on the gold J member used for bonding parts
．Attachment of paper, such as 3M's mail logo
．Selenium Coating Layer for Photophotography
