[China Aluminum Network] Aluminium has been anodized for many years. In order to achieve a solid oxide film and shiny colors, aluminum and aluminum doors and windows profiles are used at home and abroad for serious choices, and 6063 alloy is selected later (China's LD31). The alloy features: good extrusion performance, easy extrusion, moderate strength, the key is to have good oxidation properties, give aluminum doors and windows profiles a good decorative surface. This is manifested in the fact that oxide films are easy to generate and have a high degree of robustness. Oxide film thickness and color difference can be controlled, and the coloring adhesion is strong and glossy. However, the color of the oxidized color is only white and bronze, and the color is monotonous. Because of the oxidation production process, the aluminum material is cleaned, oxidized, colored, and sealed in an oxidation bath. Bath solution is also made of a variety of chemical elements. For each batch of aluminum oxide, the chemical composition in the bath is changing. Therefore, the bath is variable, and the colored aluminum material is always color-diffused. It is not obvious to place the naked eye, if put together in large areas, the color difference is very obvious. Therefore, aluminum curtain walls must not be treated with oxygen. Otherwise the aluminum curtain wall will be very ugly. [1] [2] China star optics can provide customers with a variety of replicated grating products such as diffraction gratings, reflective gratings,holographic gratings,concave gratings etc. to meet different needs. Maximum ruled area is up to 300x300mm2 for plane ruled diffraction gratings. For replicated diffraction and transmission gratings the ruling density can be from 20 grooves per millimeter to 2400 grooves per millimeter, wavelength from 0.2 micron to 25 microns.
They are widely used for applications in optical communications,biotechnology, colorimetry,chromatography,and medical instrumentation.
Handling Gratings: Gratings require special handling, making them prone to fingerprints and aerosols. Gratings should only be handled by the edges.
Holographic gratings: Holographic Grating,Holographic Blazed Grating,Holographic Concave Grating,Aberration-Corrected Holographic Grating China Star Optics Technology Co.,Ltd. , https://www.realpoooptics.com
The generation of electrostatic spraying enables the surface treatment of the aluminum panel of the curtain wall to be solved, not only reducing the color difference but also obtaining aluminum plates of various colors. Electrostatic spraying points: powder spraying and fluorocarbon spraying, powder spraying raw materials: polyurethane, polyurethane resin, epoxy resin, hydroxy polyester resin and epoxy/polyester resin, can be formulated in a variety of colors. Characteristics of powder spray: Spraying equipment is manual, automatic hanging, simple construction, coating thickness is more than 30 microns, impact resistance, abrasion resistance, corrosion resistance, weather resistance, etc., coating price than fluorocarbon Cheaper. The major weakness of powder spraying is the fear of solar ultraviolet radiation, which causes natural discoloration after long-term irradiation. The color difference between the sunny side and the non-sun-facing side of the aluminum plate is obvious after several years, and it usually produces a significant color difference between 2 and 5 years. Nowadays, the name color aluminum is used in the market. It is used for aluminum doors and windows, which is sprayed with ordinary aluminum powder. Increase the variety of colors of aluminum doors and windows, but also enhance the ability to resist corrosion.
Another type of electrostatic spraying is liquid spraying, also known as fluorocarbon spraying. Hong Kong is called oyster sauce. It belongs to the higher price of high-grade spray and has long been applied abroad. In the past two years, it has been widely used in aluminum curtain walls. Due to its excellent features, it has been increasingly valued and favored by the construction industry and users. Fluorocarbon spraying has excellent anti-fading, anti-blooming, anti-air pollution (acid rain, etc.), corrosive, anti-ultraviolet, strong crack resistance and can withstand harsh weather conditions. Is not the general coating.
First, fluorocarbon spraying raw materials and structure fluorocarbon spray coating is made of polyvinylidene difluoride resin nCH2CF2 baking (CH2CF2)n (PVDF) as base material or metal aluminum powder as color material. The chemical structure of the fluorocarbon base is combined with a fluorine/carbon bond. This kind of structure with a short bond property is considered to be a more stable and firm combination with hydrogen ions, and the chemical structure is stable and firm, so that the physical properties of the fluorocarbon coating are different from those of a common paint. In addition to its abrasion resistance in terms of mechanical properties, impact resistance has excellent properties, especially in harsh climates and environments, showing long-lasting resistance to discoloration and resistance to ultraviolet light. In the early 1960s, it began to be used in engineering plastics for wires and cables. In 1965, Pennwalt Chemical Co., Ltd. first synthesized polyvinylidene fluoride as the base material and metal particulate aluminum powder for architectural finishing paint, also known as metallic paint. With Kynar500 as a trademark. As a result, the world's manufacturers have begun to use Kynar500 to manufacture their own fluorocarbon paint finishes to meet the high-end architectural interior and exterior aluminum coating, a wide range of color choices, beautiful and dignified appearance, and durability for many of the world's magnificent The curtain wall architecture adds brilliance. The coating manufacturer's guarantee for the service life of the coating began at 10 years and 15 years and it can be guaranteed for 20 years.
U.S. research institutes have compared and tested fluorocarbon coatings, super paints, and general paints. Samples that were separately coated were exposed to hot sunlight in Florida, and exposed to the harsh environment of moist salty air for 12 years. It is proved that the stability and durability of fluorocarbon coatings are 30 and 80 percent higher than those of the other two coatings, and the fluorocarbon coatings guarantee their use in various harsh environments.
Many fluorocarbon paint manufacturers around the world commonly use Kynar500 or Hylar5000 as base materials for enamel carbon coatings. There are no formal certified manufacturers in China. The main producers of fluorocarbon coatings are:
1. British 1CI company; 2. American PPG Company; 3. American Valspar company; 4. DNTSingapore (Great Japan Paint Singapore Company); 5. Japan's Kawsai (Kansai) coating company; 6. South Korea Koreachemical company; 7. Taiwan's peak source paint company;
Second, fluorocarbon spraying technology requirements and standards Fluorocarbon spraying as a high-end surface coating process means, the entire process of the very stringent quality requirements, in addition to fluorocarbon coating factory need to obtain quality license to produce Kynar500 fluorocarbon coating material for the outside The paint manufacturer's entire surface treatment process, including the pre-treatment process, and the spray process to the curing process, require strict quality control to ensure the quality of the aluminum coating. In the fluorocarbon spraying industry today, based on AAMA-605.02.90, the standard of the American Society of Building Construction, this coating standard is recognized as the main international standard for the inspection of coating quality. The following are the main indicators for fluorocarbon spraying in the AAMA-605.02.90 standard.
In the AAMA standard, many references are made to South Florida as a test standard because the climate there is known for its moisture, high temperature, and direct sunlight, and it is considered to be a harsh environment for coating quality inspection.
There are also some similar tests in the world with the United States standard AAMA-605.02.90, which are also used to determine the quality of fluorocarbon spraying. They are:
1. British Standard BS6496-1984 "Building aluminum alloy profiles, plate coating standards".
2. Germany GSBRAL-RC6311994 Standard "Quality Inspection Standard for Building Aluminum.
3. Australian Standard AS3715-1989 "Metallic Material Coating Standard".
4. South Africa SABS-1993 "Construction Standard for Outdoor Aluminum Painting".
5. Switzerland "Using Aluminum Coating Standard for Construction Industry" 1994.
American Construction Industry Association Standard (Abstract) AAMA-605.02.90
Third, fluorocarbon spraying equipment and processes fluorocarbon coating performance is determined by itself, spraying equipment must ensure that the excellent atomization effect, to ensure the uniformity of the spray coating, the distribution of metal particles in the fluorocarbon coating, directly affect the appearance of the coating effect. The coating is uniform, and the quality of the fluorocarbon coating has a metallic luster, vivid colors and a distinct three-dimensional appearance. The use of fluorocarbon spray coating on unsuitable spray equipment can result in uneven color, shading on the surface or poor coating. Greatly affected the decorative effect of fluorocarbon, in order to achieve a good spray effect, all use high-voltage electrostatic electric spray gun. The United States, Japan, Germany and other countries produce various types of various types of spray guns. Each has its own characteristics.
The fluorocarbon spraying process uses multi-layer spraying to fully utilize the advantages of durability and weather resistance of the Kynar 500 metallic paint. From the front surface treatment of the aluminum material to the spraying process, strict quality control is required, and the final product must reach the United States architectural manufacturing. Industry Association AAMA-605.02.90 standard.
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-0.8um
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70%
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 0.2-15um
Grooves per mm: 50 to 2,400L/mm
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm
Wavelength range: 200 to 900um
Grooves per mm: 490 to 1,200L/mm
Diffraction: >70%
Surface treatment technology of fluorocarbon sprayed aluminum (1)