Application of high weather resistance color-coated aluminum

PVDF Color Coated Aluminum.3
PVDF Color Coated Aluminum.1
PVDF Color Coated Aluminum.2
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PVDF Color Coated Aluminum.3
PVDF Color Coated Aluminum.1
PVDF Color Coated Aluminum.2

PVDF Color Coated Aluminum

Aluminium coated with PVDF fluorocarbon coating has high weather resistance. It is made of roller coating with a unique double or triple coating process.

The chemical name of PVDF is polyvinylidene fluoride, which has a special chemical structure. The carbon-fluorine (CF) bond energy in the molecular structure is very strong (485KJ/MOL).  Only a small percentage of the ultraviolet light in sunlight can break the CF bond.Therefore, sunlight has almost no effect on it.The coated aluminum coil  is highly weather-resistant under wind and sun, and its surface is not easily got discoloration, it has acid and alkali corrosion resistance and excellent gloss retention.

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1. Characteristics of PVDF fluorocarbon coated color-coated aluminum sheet:

  • Super strong UV protection performance;
  • High acid and alkali corrosion resistance;
  • Excellent weather resistance,  warranty for exterior use 15-20 years ,it can meet the AAMA2605 standard.

 

2. Things to be noted when purchasing PVDF fluorocarbon coated aluminum.

  • The PVDF resin content should be greater than or equal to 70%;
  • Inorganic pigments should be used as much as possible for color mixing. Bright pigments are not recommended
  • The coating thickness is greater than or equal to 25 micron.
  • The recommended glossiness  is below 40 degrees.

 

3. Application areas of PVDF fluorocarbon coated aluminum .

  • This type of product is mainly used in office buildings, stadiums, exhibition centers, etc. Outdoor curtain wall decoration of high-end buildings.

 

4. Technical performance parameters of PVDF fluorocarbon coated aluminum 

Serial number

Test items

National standard requirements

Test results

Detection basis
1 Chromatic Aberration △E≤2.0 Higher than national standard GB/T17748
2 Glossiness Deviation ≤10 Higher than national standard GB/T17748
3 Coating thickness Minimum 23μm for two coatings ≥25μm GB/T17748
Three coatings minimum 30μm ≥32μm
4  Surface pencil hardness ≥HB ≥HB GB/T17748
5  Flexibility ≤2T ≤2T GB/T17748
6  Adhesion/Grade Circle method 1  GB/T17748
Cross-hatch method 0 
7 Impact resistance ≥50kg.cm ≥50kg.cm GB/T17748
8 Boiling water resistant No change in 2 hours No change in 2 hours GB/T17748
9 Solvent resistance 200 times without leaking ≥200 times GB/T17748
10 Hydrochloric acid resistance 5%HCL24h No change GB/T17748
11 Alkali resistance  5%NaOH no bubbling, bulge,Abnormalities such as powdering, △E≤2.0 Higher than national standard GB/T17748
12 Nitric acid resistance No bubbling, bulging, powdering and other abnormalities, △E≤5.0 Higher than national standard GB/T17748
13 Oil resistance 20# engine oil has no change for 24 hours No change GB/T17748
14 Salt spray resistance (4000h) No less than level 1 No change GB/T17748
15 Wear resistance ≥5L/μm Higher than national standard GB/T17748
16 Stain resistance ≤5% Higher than national standard GB/T17748
17 Artificial weathering resistance (aging time 4000h) Color difference △E≤4.0 △E≤4.0 GB/T17748
Light loss rate/level ≤2 ≤2 GB/T17748
Other aging properties: Level 0 Level 0 GB/T17748