Specifications (PPGI)

QUALITY STANDARDS:-

DANA STEEL has a modern in-house laboratory to conduct all necessary mechanical and Paint Tests such as:

TEST ASTM STANDARD
COLOR D2244 – 16
SALT SPRAY B117 – 18
PENCIL HARDNESS D3363 – 05(2011)e2
T-BEND D4145 – 10(2018)
DRY FILM THICKNESS D5796 – 10(2015)
CROSS HATCH ADHESION D3359 – 17
SOLVENT RESISTANCE D5402 – 19
SPECULAR GLOSS D523 – 14(2018)
MANDREL BEND TEST D522 -17
CHALK RESISTANCE D4214 – 07(2015)

 

Differences between RMP and PVDF Paints

    Rmp PVDF
General Information Resin System Polyester & Melamine Polyvinylidene Fluoride & Acrylic
Film Formation Cross linking Fusion
Peak Metal Temperature 224-2350C 249-2540C
 

 

 

 

 

 

 

 

Physical Properties

Primer & Coating Thickness Polyurethane / Polyester Primer at

4-6 microns

Polyurethane Primer at

5-7microns

Topcoat & Coating thickness  

18-20

 

20-22

 

MEK DOUBLE RUB

 

100 D/R Pass

 

100 D/R Pass

 

T-BEND

 

2-3T

 

0-1T

 

REVERSE IMPACT

 

13J (No paint Removal)

 

13J (No paint Removal)

Cross-Hatch adhesion No paint removal No paint Removal
 

PENCIL HARDNESS

 

Fmin

 

Bmin

  Water boil adhesion Pass Pass
Accelerated Weathering test Performance  

Humidity Resistance (HDG)

No blistering, Peeling, Cracking, loss of gloss or softening of the finish after 1000hrs of exposure to 100% Humidity at 100+/-50F. No blistering, Peeling, Cracking, loss of gloss or softening of the finish up to2000hrs of exposure to 100% Humidity at 100+/-50F.
QUV QUV-A

UV cycle – 4hrs at 750C

Condensation – 4 hrs at 500C

Colour change is not more than 5 NBS unit as per ASTM D 2244-89

no chalking greater than #2 rating as per AS1580-481-11,

Gloss retention is not greater than # 3 rating as per AS1580-481-5

No blistering and adhesion loss after 1000 UV hrs exposure.

Note: performance is based on colour, pigmentation chemistry dependant

QUV-B

UV cycle – 4hrs at 500C

Condensation – 4 hrs at 400C

Colour change is not more than 5 NBS unit as per ASTM D 2244-89

no chalking greater than #2 rating as per AS1580-481-11,

Gloss retention is not greater than # 3 rating as per AS1580-481-5

No blistering and adhesion loss after 1000 UV hrs exposure.

Note: performance is based on colour, pigmentation chemistry dependant

 

Salt Spray resistance (HDG)

Sample subjected to 5% neutral salt solution spray exhibit no blistering after 1000 hrs of exposure. Sample subjected to 5% neutral salt solution spray exhibit no blistering after 2000 hrs of exposure.
Chemical Resistance 30 minutes exposure to 10% HCL solution  (spot test) No colour change and no blisters No colour change and no blisters
30 minutes exposure to 5% NaOH solution. No colour change and no blisters No colour change and no blisters
  Film Integrity 10 YEARS 20 YEARS
  Chalk retention ASTM D4214 Method A Rating >2 Rating>4
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Different Layers oF Coil Coating PPGI PPGL PPAZ Coils