polypropylene powder coating pdf下载
-
product description： product description：
the polypropylene powder coating is a thermoplastic powder coating prepared with polypropylene, compatibilizers, functional additives, pigments etc. it has excellent corrosion resistance and mechanical performance as well as higher hardness and abrasion resistance.
application field
it is suitable for the coating of shelf racks in dishwasher, metal furniture, and the metal workpieces with the requirements on abrasion resistance and hardness.
powder properties
non-volatile content: ≥99.5%
dry fluidity: fluidization floating ≥20%
specific gravity: 0.91-0.95 (varies by different colors)
particle size distribution: ≤250um
melting point: 100-160℃
storage: store in a ventilated and dry room below 35℃, and prevent from being close to the source of ignition. the storage period is two years from the manufacturing date. it shall be retested when it is expired, and it can still be used if it is qualified. in addition, it is recommended that the product shall be used on the first-in and first-out basis.
packing: it is packed in composite paper bags, and the net weight per bag is 20 kg.
application
pre-treatment: it can be degreased via the high temperature method and the solvent method, or rust can be removed by the chemical method and sand blasting. after treatment, the surface of the substrate shall be neutral.
pre-heating temperature of workpiece to 250-400℃ [it can be adjusted according to the heat capacity (i.e. the metal thickness) of the workpiece].
fluidized bed dip coating for 4-8 seconds [it can be adjusted according to the metal thickness and the shape of the workpiece].
plasticization at 200±20℃ for 0-5 minutes [the post-heating plasticization process is required in order to obtain a smooth coating].
cooling: air cooling or natural cooling.
coating performance
sample panel prepared for the following test data.
2mm thick steel plate, degreasing and rust removal, and coating applied with thickness of 400um.
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°
50~60
bending (with the film thickness of 200μm) gb/t 6742
≤2mm
shore hardness (d) gb/t 2411
60
adhesion (jt/t 6001)
level 0-1
impact test (9n·m) gb/t18226
no peeling or fracture in the coating
salt spray (no crossing) 500h gb/t 18226
no blistering, peeling and rusting
environmental stress cracking gb/t 1842
more than 1,000h
artificial weathering resistance for 1,000h gb/t 1865
no blistering and cracking
soak in hot water at 90℃ for 10 days
no blistering and cracking
european union standard for food contact test
qualified
hygiene & safety
this powder coating is a non-toxic product, but the inhaling of dust shall be avoided during use. it is recommended that operators shall wear appropriate dust masks and glasses. if possible, avoid long-term skin contact with powder coatings. we recommend installing an edge exhaust fan above the fluidized bed.
caution
in order to obtain the best adhesion, it is recommended to carry out phosphating or chromizing treatment on the basis of degreasing and de-rusting of the substrate.
workpiece design: the sharp parts shall be ground, there shall be no gap in the welding, the metal thickness and the wire diameter in a workpiece shall be close.
like all polymer powders, especially in the flowing condition, the powder coating can be ignited or burned if contact with a high-temperature source.