| Customization: | Available |
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| CAS No.: | 26680-22-8 |
| Formula: | C3h8n2o |
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| Polyurethane powder coatings have several advantages: Excellent adhesion Excellent chemical resistance Excellent corrosion resistance Excellent flexibility Excellent hardness Good exterior durability |
Disadvantages: Restricted cure range Potential odor and smoke from cure Higher cost compared to other types of coatings |
| Surface Preparation |
The substrate should be free of grease, oil, dirt, fingerprints, drawing compounds, any contamination, and surface preparation treatments to ensure optimum adhesion and coating performance properties.
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| Application |
A powder spray gun is used, which when triggered gives an electrostatic charge to the powder particles passing through it. As the parts to be coated are grounded, the powder is attracted towards the part via the electrostatic process.
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| Curing |
Once the powder is applied the parts are cured in an oven, which melts and cross-links the powder over the surface of the part and creates a tough, scratch-resistant, and beautiful finish.
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| 1. Surface Preparation: Before applying the powder, the substrate must undergo thorough cleaning to remove any contaminants like oil, grease, or rust. This crucial step ensures proper adhesion and a flawless finish. The substrate is freed from dust, scale, rust, grease, dirt, and any oxide layers (for example on aluminum). |
| 2. Proper Grounding: The most common cause of application issues is poor grounding. There needs to be some kind of connection from your part - the substrate being coated - to that earthen ground, be it racks or hangers etc. Also, ensure that these connecting parts are clean, because if there is not good metal to metal contact the charge will not pass through as easily. |
| 3. Gun Settings: Your gun settings may actually be the problem. Too much powder flow and incorrect kV levels can negatively affect an application. Straight away, make sure that you have a good earthen ground. |
| 4. Regular Maintenance and Cleaning: A regular maintenance and cleaning system is a good process to have in place. Powder builds up on racks, electrodes, and hooks, and needs to be cleaned away regularly. |
| 5. Temperature Control: Proper temperature control is essential for a successful powder coating application. Too high or too low temperatures can cause issues such as insufficient gloss, discoloration, orange peel texture, pinholes, and air bubbles. |
| 6. Cleanliness: Keeping your workspace clean can help prevent contamination that could affect the finish of your powder coating. |
| 7. Powder Application Techniques: Different powder application techniques can result in different finishes. It's important to understand the specific requirements of the powder you're using and adjust your application technique accordingly. |
| The State in the Container | Uniform color, without foreign matter, fluffy powder |
| Screenings (125μm) | Concerted |
| Appearance | Texture clear, equally distributed, without impurity and big particle |
| Hardness | Flat Surface ≥Fair, concerted with rough surface |
| Adhesion | ≤ Level 2 (film thickness 60 ±10 μm) |
| Impact Resistance | ≥ 40 cm (film thickness 60 ±10 μm) |
| Bending Test | ≤ 4 mm (film thickness 60 ±10 μm) |
| Cupping Test | ≥ 4 mm (film thickness 60 ±10 μm) |
| Alkalis Resistance (5% NaOH) | 168 Hours no abnormal, concerted with metallic powder |
| Acids Resistance (3% HCI) | 240 Hours no abnormal, concerted with metallic powder |
| Damp Heat Test | 500 Hours no abnormal |
| Salt Mist Test | 500 Hours no abnormal, ≤ 2.0mm corrosion at break line |
| Accelerated Aging Test | 500 Hours, Fade ≤ 2 grades; Loss of gloss ≤ 2 grades;concerted with metallic powder |
| Heavy Metal | Almost Zero (Test by ROHS Standards) |
| Soluble Lead/chrome | Almost Zero (Test by ROHS Standards) |
Q1: What is your minimum order quantity?
The minimum order quantity is 1kg, and we accept orders for different products to be mixed and shipped together.
Q2: Which port is closest to you?
The nearest port to our factory is Xiamen Port, and we can also ship products to Guangzhou, Shenzhen, Yiwu and other ports.
Q3: Can you provide samples?
Yes, we provide free samples, you only need to pay the shipping cost.
Q4: Can you do OEM?
Yes, we can do branding, logo and different packaging sizes according to your requirements.
Q5: Can you produce products according to different requirements?
Yes, we have our own R&D team, tell us your requirements and we can develop it together.
Q6: Where is your factory?
It is located in Xiamen City, Fujian Province, and warmly welcomes you to visit us.
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