6063 Alloy Aluminum Sliding Window Frame Green Powder Coating

Product Specification

6063 Alloy Aluminum Sliding Window Frame Green Powder Coating Aluminium Metal Building Materials

Product Details:

Aluminum Windows Advantages:

Thickness
There are two types of aluminum alloy sliding doors, 70 series and 90 series, and 70 series is sufficient for aluminum alloy sliding doors inside the residence. The series number represents the number of millimeters in the thickness of the door frame. There are four types of aluminum alloy sliding windows: 55 series, 60 series, 70 series and 90 series. The selection of the series should be based on the size of the window and the local wind pressure. The aluminum alloy sliding window used as a closed balcony should not be less than 70 series.
 

Strength
The tensile strength should reach 157 Newtons per square millimeter, and the yield strength should reach 108 Newtons per square millimeter. When purchasing, you can bend the profile moderately with your hands, and it should be able to recover after letting go.
 

Chroma
The color of the same aluminum alloy profile should be the same. If the color difference is obvious, it is not suitable for purchase.
 

Flatness
Check the surface of the aluminum alloy profile, there should be no depression or bulging.
 

Gloss
For aluminum alloy doors and windows, avoid choosing profiles with open bubbles (white spots) and slag (black spots) on the surface, as well as obvious defects such as cracks, burrs, and peeling.
 

of oxidation
The oxide film thickness should reach 10 microns. When purchasing, you can swipe lightly on the surface of the profile to see if the oxide film on the surface can be wiped off.

Properties of Powder Coating:

Because powder coating does not have a liquid carrier, it can produce thicker coatings than conventional liquid coatings without running or sagging, and powder coating produces minimal appearance differences between horizontally coated surfaces and vertically coated surfaces. Because no carrier fluid evaporates away, the coating process emits few volatile organic compounds (VOC). Finally, several powder colors can be applied before curing them all together, allowing color blending and bleed special effects in a single layer.

While it is relatively easy to apply thick coatings that cure to smooth, texture-free coating, it is not as easy to apply smooth thin films. As the film thickness is reduced, the film becomes more and more orange peeled in texture due to the particle size and glass transition temperature (Tg) of the powder.

Most powder coatings have a particle size in the range of 2 to 50 μ (Microns), a softening temperature Tg around 80 °C, a melting temperature around 150 °C, and are cured at around 200 °C. for minimum 10 minutes to 15 minutes (exact temperatures and times may depend on the thickness of the item being coated). ^[3] For such powder coatings, film build-ups of greater than 50 μ (Microns) may be required to obtain an acceptably smooth film. The surface texture which is considered desirable or acceptable depends on the end product. Many manufacturers prefer to have a certain degree of orange peel since it helps to hide metal defects that have occurred during manufacture, and the resulting coating is less prone to showing fingerprints.

There are very specialized operations where powder coatings of less than 30 micrometres or with a Tg below 40 °C are used in order to produce smooth thin films. One variation of the dry powder coating process, the Powder Slurry process, combines the advantages of powder coatings and liquid coatings by dispersing very fine powders of 1–5 micrometre sized particles into water, which then allows very smooth, low film thickness coatings to be produced.

For garage-scale jobs, small "rattle can" spray paint is less expensive and complex than powder coating. At the professional scale, the capital expense and time required for a powder coat gun, booth and oven are similar to a spray gun system. Powder coatings have a major advantage in that the overspray can be recycled. However, if multiple colors are being sprayed in a single spray booth, this may limit the ability to recycle the overspray.

Types of Powder Coating: 

There are three main categories of powder coatings: thermosets, thermoplastics, and UV curable powder coatings. Thermoset powder coatings incorporates a cross-linker into the formulation.

Most common cross-linkers are solid epoxy resins in so-called hybrid powders in mixing ratios of 50/50, 60/40 and 70/30 (polyester resin/ epoxy resin) for indoor applications and triglycidyl isocyanurate (TGIC) in a ratio of 93/7 and β-hydroxy alkylamide (HAA) hardener in 95/5 ratio for outdoor applications. When the powder is baked, it reacts with other chemical groups in the powder to polymerize, improving the performance properties. The chemical cross-linking for hybrids and TGIC powders-representing the major part of the global powder coating market- is based on the reaction of organic acid groups with an epoxy functionality; this carboxy-epoxy reaction is thoroughly investigated and well understood, by addition of catalysts the conversion can be accelerated and curing schedule can be triggered in time and/or temperature. In the powder coating industry it is common to use catalyst masterbatches where 10-15% of the active ingredient is introduced into a polyester carrier resin as matrix. This approach provides the best possible even dispersion of a small amount of a catalyst over the bulk of the powder.

Concerning the cross-linking of the TGIC-free alternative based on HAA hardeners there is no known catalyst available.

For special applications like coil coatings or clear coats it is common to use glycidylesters as hardener component, their cross-linking is based on the carboxy-epoxy chemistry too. A different chemical reaction is used in so-called polyurethane powders, where the binder resin carries hydroxyl functional groups that react with isocyanate groups of the hardener component. The isocyanate group is usually introduced into the powder in blocked form where the isocyanate functionality is pre-reacted with ε-caprolactame as blocking agent or in form of uretdiones, at elevated temperatures (deblocking temperature) the free isocyanate groups are released and available for the cross-linking reaction with hydroxyl functionality.

In general all thermosetting powder formulations contain next to the binder resin and cross-linker additives to support flow out and levelling and for degassing. Common is the use of flow promoter where the active ingredient -a polyacrylate- is absorbed on silica as carrier or as masterbatch dispersed in a polyester resin as matrix. Vast majority of powders contain benzoin as degassing agent to avoid pinholes in final powder coating film.

The thermoplastic variety does not undergo any additional actions during the baking process as it flows to form the final coating. UV-curable powder coatings are photopolymerisable materials containing a chemical photoinitiator that instantly responds to UV light energy by initiating the reaction that leads to crosslinking or cure. The differentiating factor of this process from others is the separation of the melt stage before the cure stage. UV-cured powder will melt in 60 to 120 seconds when reaching a temperature 110°C and 130°C. Once the melted coating is in this temperature window it is instantly cured when exposed to UV light.^[7]

The most common polymers used are: polyester, polyurethane, polyester-epoxy (known as hybrid), straight epoxy (fusion bonded epoxy) and acrylics.

Photos:

Please tell us the information below, and we will give the best suggestion to you !

1. Where you intend to use the aluminium profiles?

2. If you have the estrusion drawing, send us and we develop the correspondence mold.

3. Which color you want or tell us the architectural style you like.

4. Purchase quantity. It will convenient us to give you the best price.