Technical Resources Area
Technical Resources Area |
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GENERAL DESCRIPTION
Plascoat PPA 571 has been specifically designed to provide a long lasting, tough coating for exterior applications to mild steel, galvanized steel and aluminum. It is based on an alloy of acid modified polyolefins. Therefore it is halogen free and the combustion fumes are low in smoke and have a very low toxicity index.
Plascoat PPA 571 is resistant to stress cracking, adverse weather conditions, detergents, salt spray and typical airborne pollutants. The coating maintains excellent adhesion to the metal substrate without the need for a separate primer. The material also provides a good degree of electrical insulation, abrasion and impact resistance.
PPA 571 is normally applied by the fluidized bed process, but it can also be applied by flock-spray or flame spray techniques. Whilst PPA 571 is suitable for flame spraying. The flame spray method uses extremely high temperatures and therefore care should be taken to avoid degradation of the powder during application.
For electrostatic spraying - see PPA 571ES
| TYPICAL USES
Fence posts, fencing panels, sign posts, street furniture, balustrading, stadium seating, pipes including potable water, cable tray and ducting. Garden furniture, gutter brackets, battery boxes, hand rails, fan guards and wirework.
GUIDE TO TYPICAL COATING CONDITIONS
Recommended Pre-treatment: For mild steel, ensure metal is clean by thorough degreasing and removal of mill scale. To get the full benefits of the material, mild steel should be blast cleaned to Swedish standard SA 2½-3. Alternatively degreasing and iron phosphating can be used. For galvanized steel the surface should be grit blasted with a fine non-ferrous medium at a low pressure. For maximum long term adhesion, a suitable phosphate or chromate system should be used.
Fluid Bed Batch Operation: Metal preheat temperature 428°F - 608°F, depending on metal thickness. Dip for 3-5 seconds. A post-heat cycle at 338°F may be required to develop fully the surface finish on thin items. The process temperatures used should only be the minimum to achieve an acceptable surface finish. However to ensure optimum adhesion a metal temperature must exceed 302°F. Overheating may cause the coating to discolor later in storage or in service.
Thicknesses outside the recommended range may be detrimental to the properties of the coating.
Flock spray method After pre-treating the metal as above the substrate should be pre-heated to a metal temperature of 356°F to 428°F. To ensure optimum adhesion a metal temperature must exceed 302°F. The PPA 571 can then be sprayed onto the metal until the coating no longer melts - i.e. with a "sugar-like" appearance. The item is then returned to the oven to fully melt the coating. To obtain thicker coatings more powder can be sprayed onto the molten first coat and re-heated. This process can be repeated until the desired thickness is achieved.
For typical properties of the coating see below.
HEALTH AND SAFETY
Plascoat PPA 571 is supplied as a finely divided powder. Whilst there are no known health hazards associated with PPA 571, normal handling precautions for dealing with fine organic powders should be taken - i.e. excessive dust generation and inhaling of the powder should be avoided. Facilities may be required for removing excess dust from the working area during the coating of certain difficult items.
As with all polymeric powders, the material can ignite if brought into contact with a high temperature source or ignition - particularly in the fluidized condition.
Reference should be made to Plascoat Health and Safety Data Sheet HS504, available on request.
Should the coating be required for contact with food or potable water, further details should be obtained from Plascoat. |
TYPICAL PROPERTIES OF THE
POWDER
TYPICAL PROPERTIES OF THE MATERIAL
*These values may vary from color to color
STORAGE
Stored in a clean dry area at 50-77°F and out of sunlight, the material should not deteriorate. However, in the interest of good housekeeping, old stocks should be used first.
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TYPICAL PROPERTIES OF THE COATING
The following data applies to a 14 mils coating applied under standard conditions onto 0.125 inch thick steel or aluminum. The pre-treatment consisted of degreasing and grit-blasting unless otherwise stated.
| Recommended Coating Thickness | 12 - 30 mils | |
| Appearance | Smooth/Glossy | |
| Gloss | ISO 2813 | 70 |
| Impact Strength
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Gardner (drop weight) ISO
6272 Direct 73°F (0.125 inch plate) Indirect 32°F (0.125 inch plate)
Direct 73°F (0.03 inch plate) Indirect 32°F (0.03 inch plate) |
24 in.lbs 150 in.lbs
> 240 in.lbs > 240 in.lbs |
| Abrasion | Taber ASTM D4060/84 H18, 500g load, 1000 cycles |
60 mg weight loss |
| Salt Spray
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ISO 7253 Steel - Scribed
- Unscribed Aluminum - Scribed - Unscribed |
Results after 1000
hours Loss of adhesion less than 10mm from scribe. Under film corrosion 2-3mm No loss of adhesion No loss of adhesion No loss of adhesion |
| Chemical Resistance*
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- Dilute Acids 140°F - Dilute Alkali 140°F - Salts (except peroxides) 140°F - Solvents 73°F |
Good Good Good Poor |
| Adhesion | PSL, TM 19 | A-1 |
| Weathering
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QUV ASTM G53-77
Florida 45° facing South |
2000 hrs - No
significant change in color or loss of gloss. 3 years - No significant change in color or loss of gloss. |
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Burning Characteristics
Ignitability
Surface spread of flame
Fire Propagation
Flammability |
BS476: Pt5: 1979 500 micron coating BS476: Pt7: 1979 500 micron coating BS476: Pt6: 1989 500 micron coating UL94 |
P - not easily ignitable
Class 1
I = 0.2
Vo (see also Properties of Material) |
| Safe Working Temperature | (Continuous in air) | 140°F max |
*Further technical advice may be obtained from Plascoat concerning the effects of particular chemicals or mixtures.
| QUALITY
Plascoat is committed to the manufacture and supply of a wide range of thermoplastic coating powders. This service is backed by the unrivalled experience of over 50 years of powder coating application.
With a policy of continuous improvement to its range of products, Plascoat reserves the right to alter or amend any item. Stringent quality control procedures are carried out at every relevant stage of manufacture and Plascoat operates a quality management system approved by BSI in accordance with ISO 9001:2000. |
Plascoat
can also offer, through its factories in Europe, specialist
plastic coating equipment, an extensive
custom coating service
and a size reduction service for plastics and other materials.
Plascoat is a subsidiary member of the IPT Group of companies.
Plascoat is a UK registered trade name.
It should be appreciated that the information given here is, to the best of our knowledge, true and accurate. However, since conditions under which our materials and equipment may be used are beyond our control, recommendations are made without warranty or guarantee. |
See also PPA 571H PPA 571ES PPA 571HES
| Plascoat Systems Limited Trading Estate, Farnham, Surrey, GU9 9NY United Kingdom Tel: +44 (0) 1252 733777 Fax: +44 (0) 1252 721250 email: sales@plascoat.com |
Plascoat Europe BV Kerkweg 11, Postbus 9 3214ZG Zuidland The Netherlands Tel:+31 (0) 181 458 888 Fax:+31 (0) 181 458 877 salespce@plascoat.nl |
Plascoat Corp Crown Centre Suite 600 5005 Rockside Rd Cleveland OH44131 U.S.A. Tel: 800 489 7236 Fax:+1 216 520 1273 plascoat@nls.net |
Plascoat Corp (Sales & Dist) Punda Mercantile Inc 4115 Sherbrooke Str West, Suite 610, Montreal, Quebec H3Z 1K9 Call: 800 489 7236 Tel: +1 514 931 7278 Fax: +1 514 931 7200 sales@punda.com |
USA/PPA571 11/02/06