Product Description：
JB polyethylene powder coating is a thermoplastic powder coating made of polyethylene resin, pigments, fillers and functional additives. These coatings have excellent chemical stability, low temperature resistance, electrical insulation, safety, flexibility, and non-toxicity.
Application Area：
These coatings are suitable for various applications of wire mesh products, such as indoor basket, refrigerator shelves, mesh rack, bicycle mesh basket, etc.
Powder Coatings Properties：
| Dry fluidity: | fluidization floating ≥20% |
| Non-volatile content: | ≥99.5% |
| Particle size distribution: | ≤300um |
| Specific gravity: | 0.91-0.95 (varies by different colors) |
| Melt index: | 5-50 g/10min (2.16kg, 190℃) (depending on the workpiece to be coated and the process) |
Storage:
To store the coating, it is important to keep it in a well-ventilated, dry room, away from any potential ignition source. The proposed storage period is two years from the date of production. After this period, the coatings shall be re-tested and they may still be used if they meet the required standards. It is also recommended to use paint in first out.
Packing:
The paint is packaged in composite kraft paper bags, each weighing 25 kg.
Instructions for using the coatings:
Before painting, the surface needs to be pretreated.This can be done by using high temperature or solvent methods to remove the grease from the surface.Alternatively, chemical methods or sandblasting can be used to remove rust.After pretreatment, the substrate surface should be neutral.
The workpiece should be preheated to a temperature of 250-350°C.The temperature can be adjusted according to the heat capacity (i.e. metal thickness) of the workpiece.
Pretreatment: Grease can be removed by using high temperature or solvent methods, while rust can be removed by using chemical methods or sandblasting.After treatment, the substrate surface must be neutral.The workpiece should be preheated to a temperature of 250-350°C, which can be adjusted according to the heat capacity (i.e. metal thickness) of the workpiece.
The workpiece should be immersed in the fluid bed coating for 4-8 seconds (adjustable according to the metal thickness and the shape of the workpiece).
Plasticization should be carried out at a temperature of 180-250°C for a time of 0-5 minutes (plasticization after heating helps to obtain a smooth coating).Cooling can be achieved by natural means or by air cooling.
Coating Performance:
Sample plates were prepared for the test table below.
A 2mm thick steel plate will undergo degreasing and rust removal, followed by the application of a 400μm thick coating.
Color GB/T9761 | No visible difference (compared with the standard plate) |
Appearance (visual inspection) | Smooth (slight orange peel is permissible) |
Film thickness μm GB/T 13452.2 | 250~600 |
Gloss % GB/T 9754, 60° | 10~80 (it is adjusted according to customer requirements) |
Bending (with the film thickness of 200μm) GB/T 6742 | ≤2mm |
Shore hardness (D) GB/T 2411 | 45~55 |
Low temperature resistance Q/HJ 008-2008 | No cracking at -35℃ for 60h |
Soaked in 5%Hcl for 7d GB/T11547 | No change in coating appearance |
Soaked in 5%NaOH for 7d GB/T11547 | No change in coating appearance |
Soaked in 5%NaCl for 7d GB/T11547 | No change in coating appearance |
Hygiene & Safety:
Powder coating is a safe product, but dust inhalation should be avoided during use. Operators are recommended to wear appropriate dust masks and goggles.
If possible, avoid prolonged skin exposure to the powder coatings. We recommend installing an exhaust fan above the fluidized bed.
Caution：
Overheating can cause the aging and discoloration of the coated film. But if the temperature is too low, it will be defects on the film, roughness and other problems. Therefore, the important thing, the optimal heating temperature should be determined based on the customer's metal thickness and the coating facilities tested.
This product is not recommended for post-processing (post-coated deformation parts) products.
Design: sharp parts shall be grounded and have no gap during welding. The metal thickness and wire diameter in the workpiece shall be very closely together.
As with all polymer powders,the powder coatings can be ignited or burned if the coating touches a high temperature source, especially under the flow conditions.
