Technical Resources Area
Technical Resources Area |
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GENERAL DESCRIPTION
Plascoat PPA 571 H is a thermoplastic polyolefin based alloy, designed for application by fluidised bed dipping. When correctly applied over a suitably prepared metal surface, Plascoat PPA 571 H provides an excellent long-term corrosion resistant coating. The coating maintains excellent adhesion by chemical bonding to the metal substrate without the need for a separate adhesive primer.
Plascoat PPA 571 H Blue 536 is a "Water Byelaws Scheme - WRc Approved Product" for contact with potable water.
Plascoat PPA 571H has a higher melt viscosity than standard PPA 571, which gives it a higher resilience. It is therefore more suitable for coating thicker metal sections e.g. greater than 5mm. The high resilience makes it ideally suitable for gasket flanged surfaces and applications requiring '0' ring seals.
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TYPICAL USES
Pipes and Fittings for the water and aqueous chemicals industries.
GUIDE TO TYPICAL COATING CONDITIONS
Recommended Pretreatment: For mild steel, ensure metal is clean by thorough degreasing and removal of mill scale. To get the full benefits of the material, the metal can be blast cleaned to Swedish standard SA 2½-3. For galvanised 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.
Batch Operation: Metal preheat temperature 240°C - 300°C, depending on metal thickness. (This assumes this is greater than 5mm). Dip for 5-10 seconds. A post-heat cycle at 200°C may be required to develop fully the surface finish.
The process temperatures used should be the minimum required to achieve an acceptable surface finish.
Overheating may causethe coating to discolour later in storage or in service.
Thicknesses outside the recommended range may be detrimental to the properties of the coating. If the temperature of the fluidised bed is likely to exceed 60°C,please discuss with Plascoat.
For typical properties of the coating see below.
HEALTH AND SAFETY
Plascoat PPA 571 H is supplied as a finely divided powder. Whilst there are no known health hazards associated with PPA 571 H, 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 more 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 HS504, available on request.
Should the coating be required for contact with food or potable water, further details should be obtained from Plascoat.
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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 10-30°C and out of sunlight, the material should not deteriorate. However, in the interest of good housekeeping, old stocks should be used first. |
TYPICAL PROPERTIES OF THE COATING
The following data applies to a 500 micron coating applied under standard conditions onto 3mm thick steel or aluminium. The pre-treatment consisted of degreasing and grit-blasting.
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Recommended Coating Thickness |
500-1000 microns |
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Appearance |
Smooth/Glossy |
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Gloss |
ISO 2813 |
60 |
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Impact Strength |
Gardner (drop weight) ISO 6272 Direct 23°C |
3.5 Joules Tested on 6mm thick mild steel plate |
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Abrasion |
Taber ASTM D4060/84 H18, 500g load, 1000 cycles |
50 mg weight loss |
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Salt Spray
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ISO 7253 Steel - Scribed
- Unscribed Aluminium - Scribed - Inscribed |
Results after 1000 hours Loss of adhesion less than 10 mm from scribe Under film corrosion 1.0 mm No loss of adhesion No loss of adhesion No loss of adhesion |
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Chemical Resistance*
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- Dilute Acids 60°C - Dilute Alkali 60°C - Salts (except peroxides) 60°C - Solvents 23°C |
Good Good Good Poor |
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Adhesion |
PSL, TM 19 |
A-1 |
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Weathering
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QUV ASTM G53-77
Florida 45° facing South |
2000 hrs - No significant change in colour or loss of gloss. 3 years - No significant change in colour or loss of gloss |
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Burning Characteristics Ignitability ** Surface spread of flame **
Flammability |
BS476: Pt5: 1979 500 micron coating BS476: Pt7: 1979 300 micron coating UL94 |
P = not easily ignitable
Class 1
Vo (see also Properties of Material) |
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Safe Working Temperature |
(Continuous in air) |
70°C max |
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Further technical advice may be obtained from Plascoat concerning the effects of particular chemicals or mixtures.** Results based on chemically similar coating material.
| 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 571 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 |
PPA571H/19/04/06 /Web