lx polyethylene powder coatingpdf下载
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product description： product description：
the lx polyethylene powder coating is a thermoplastic powder coating prepared with polyethylene resins, compatibilizers, functional additives, pigments and fillers, etc. it has excellent adhesion, corrosion resistance, chemical stability, electrical insulation, and low temperature resistance. the outdoor weather resistance can be designed according to the customer needs. compared with ordinary polyethylene powders, thin coating is one of its main features by spraying for both cold and hot conditions. also it can be applied by fluidized bed.
application field
it is suitable for various chemical equipment, industrial pipelines and metal parts by spraying.
powder properties
non-volatile content: ≥99.5%
specific gravity: 0.91-0.95 (varies by different colors)
particle size distribution: ≤200um
melt index: 5-50 g/10min (2.16kg, 190℃) [depending on the workpiece to be coated and the process].
storage: store in a cool and dry area below 35℃, and use on the first-come and first-served 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.
spraying process: spraying at room temperature or pre-heated.
spraying process parameters (for reference): electrostatic spray gun, voltage: 40~100kv, film thickness: 150~450 um.
plasticization at 180-250℃ for 0-20minutes [the post-heating plasticization process is beneficial 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)
level and smooth (slight orange peel is permissible)
film thickness µm gb/t 13452.2
150~400
gloss % gb/t 9754, 60°
10~75 (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 (refer to 5.5.2.3.2 in jt/t 600.1)
level 0
impact test (9n·m) 6.3.5 in gb/t18226
no peeling or fracture occurs in the coating
salt spray
no crossing for 500h gb/t 18226
no blistering, peeling and rusting
crossing for 8h gb/t 18226
no blistering, peeling and rusting
damp and heat resistance for 8h gb/t 1740
no blistering, peeling and rusting
accelerated weathering test, 1,000h gb/t 1865
loss of gloss and discoloration: level 1; chalking and cracking: level 0
natural exposure for one year gb/t9276
loss of gloss and discoloration: level 1; chalking and cracking: level 0
soaked in 5%hcl for 400h
no change in coating appearance
soaked in 5%naoh for 72h
no change in coating appearance
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.
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.
excessive heating will lead to aging and discoloration of the coating film. however, if the temperature is too low, it would cause the defects such as thin and rough coating film, etc. therefore, the optimum heating temperature shall be determined through experiments according to the metal thickness and the coating facilities of the customer.
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.
this product is not recommended to use in post-processing (re-deformed workpiece after coating) products.
like all polymer powders, especially in the flowing condition, the powder coating can be ignited or burned if contact with a high-temperature source.