Technical Resources Area
Technical Resources Area |
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GENERAL DESCRIPTION
Plascoat PPA 801 is a superior high performance coating powder based on an alloy of thermoplastics using a new hybrid technology. It has been specifically designed to be applied by the fluidised bed dipping process to give a protective coating with excellent resistance to aqueous environments. It differs from the Plascoat PPA 600 series in that the coating bonds to metal under all conditions which ensure a smooth pinhole free coating. Furthermore this coating has a high thermal stability, which further increases the coating window. This high stability ensures a significant improvement in the coating life. Plascoat PPA 801 is resistant to stress cracking, salt, airborne pollutants and to dilute acids and alkalis whilst maintaining excellent adhesion to the metal substrate without the need for a separate primer. Phosphating is recommended for long life in aggressive environments. Plascoat PPA 801 provides excellent electrical insulation and can withstand steady or cycling temperatures between -40°C and +80°C in air. The adhesion of the coating is retained after more than 12 months in water at 80°C.
| TYPICAL USES
Pipes tanks and fittings for aqueous environments
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.
Fluid Bed Batch Operation: Metal preheat temperature 270°C - 350°C, depending on metal thickness. Dipping time for 5-20 seconds. When coating thin metal, a cure cycle at 160°C to 200°C may be required to completely melt the coating. The coating may be air-cooled or water quenched.
Thicknesses outside the recommended range may be detrimental to the properties of the coating.
For typical properties of the coating see below.
HEALTH AND SAFETY
Plascoat PPA 801 is supplied as a finely divided powder. Whilst there are no known health hazards associated with PPA 801, 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 fluidised condition.
Reference should be made to Plascoat Health and Safety Data Sheet HS 516, 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 colour to colour
STORAGE
Stored in a clean dry area at ambient temperature 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 500 µ coating of Plascoat PPA 801 applied under standard conditions onto 3mm thick steel plate followed by water quenching. The pre-treatment consisted of degreasing and grit-blasting unless otherwise stated. Tests were carried out at 23°C unless otherwise stated.
| Recommended Coating Thickness | 500-1000 µ | |
| Appearance | Smooth coating | |
| Impact Strength
|
EN 10285 Annex D Direct 23°C |
>4 Joules |
| Abrasion | Taber ASTM D4060/84 H18, 500g load, 1000 cycles |
70 mg weight loss |
| Salt Spray
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ISO 7253 Steel (Scribed) - Un-phosphated
- Phosphated |
Results after 1000
hours
Loss of adhesion less than 7mm from scribe. Under film corrosion -nil Loss of adhesion less than 3mm from scribe. Under film corrosion -nil |
| Chemical Resistance*
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- Dilute Acids 60°C - Dilute Alkali 60°C - Salts (except peroxides) 60°C - Solvents 23°C |
Very good Very good Very good Poor |
| Adhesion | PSL, TM 19 | A-1 |
| Weathering
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QUV ASTM G53-77 | 2000 hrs - No significant change in colour or loss of gloss. |
| Cathodic disbondment | BS3900: F11 (1.5 Amps, 7 days at 40°C) Degreased and grit-blasted mild steel. |
7-8 mm disbondment |
| Safe Working Temperature | (Continuous in air) | 60°C 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 661 PPA 662 PPA 571
| 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 |
PPA801 19/04/06