Product Description:
The JM polyethylene powder coatings are made using polyethylene resins, functional additives, compatibilizers, fillers, and pigments. These coatings have exceptional adhesion, chemical stability, resistance to corrosion, electrical insulation, and low temperature resistance.
Application Area:
These coatings are suitable for applying to the interior of fire extinguisher cylinders.
Powder Coatings Properties:
Dry flowability: fluidization floating ≥20%
Non-volatile content: ≥99.5%
Specific gravity: 0.91-0.95 (varies depending on color)
Particle size distribution: ≤300um
Melt index: 10 g/10min (2.16kg, 190℃) (varies based on the object being coated and the process used)
Storage:
Keep these coatings in a well-ventilated, dry room below 35℃ and away from any potential fire sources. The storage period is two years from the production date. After the expiration date, retesting is recommended. If the coatings pass the test, they can still be used. Additionally, it is advised to use the products in a first-in, first-out manner.
Packing:
These coatings are packaged in composite kraft paper bags, with each bag weighing 25 kg.
Instruction:
Preparation: Before applying the coating, it is important to remove any grease, rust, and treat the surface with phosphorization.
Heating: The work should be preheated to a temperature between 250-350℃, which can be adjusted based on the specifications of the cylinder.
Application: The coating can be applied using either a roller or pressure supply method. For plastic molding, it should be heated at a temperature of 180-220℃ for 0-5 minutes, depending on the cylinder specifications. Heating the molding process helps achieve a smooth coating.
Cooling: After applying the coating, it can be cooled naturally or with the help of air.
Coating Performance:
A sample panel should be prepared for testing purposes.
A 2mm thick steel plate should be degreased, rust removed, and coated with a thickness of 400μm.
Color GB/T9761 | No visible difference (compared with the standard plate) |
Appearance (visual inspection) | Level and 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 |
Adhesion (10mm width 180° peeling) | ≧3 kg/10mm (it is judged to have qualified adhesion when the coating snaps and breaks) |
High and low temperature resistance test (-30~20~60~20℃) | 8 cycles, no cracking or detachment of the coating |
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:
The powder coating is not toxic, but it is important to avoid inhaling the dust during use. Operators should wear appropriate dust masks and glasses.
Caution:
Overheating can cause the coating film to age and change color. On the other hand, if the temperature is too low, it can result in poor pulverization and a rough coating film. Therefore, the optimal heating temperature should be determined through testing based on the customer's metal thickness and coating facilities.
Workpiece design: sharp parts should be grounded, welding without clearance;
Do not contact the inner wall of the treated cylinder unarmed, because unarmed contact will affect the adhesion of the powder coating and coating;
This product is not recommended for post-treatment (deformation after coating) products;
As with all polymer powders, especially under flow conditions, the powder coating can be ignited or burned if exposed to a high temperature source.
