Technical Resources Area
Technical Resources Area |
|
|
||
GENERAL DESCRIPTION
Plascoat PPA 665HF is a polyolefin based polymer alloy, developed for application onto metal cylinders by rotational lining to give a protective coating with excellent resistance to aqueous environments, including the foaming agent A.F.F.F. and is also resistant to up to 30% Antifreeze (ethylene glycol). When correctly applied, the coating gives excellent adhesion without the need for a separate adhesive priming coat and can withstand steady or cycling temperatures between -40°C and +65°C. Plascoat PPA 665HF coated cylinders meet requirements of EN3.
PPA 665HF differs from PPA 665 in that it provides better melt flow and produces a smoother coating. Therefore it is better at coating some types of weld area. The better flow also allows the use of lower process temperatures with consequent cost savings in energy. However the lower melt viscosity may cause sagging of the coating in the external painting stoving ovens especially if the cylinders are left in this oven for excessive periods of time. PPA 665HF is available in grey.
|
TYPICAL USES
The internal lining of portable fire extinguishers.
GUIDE TO TYPICAL COATING CONDITIONS
Recommended Pretreatment: Degrease - alkaline/solvent degrease Shotblast to Swedish standard SA 2½ to 3 or iron phosphate.
Typical application using Plascoat DHSC lining machine on 3mm steel cylinder. Preheat 1.75 minutes (Metal Temperature between 240°C and 280°C) Dwell 30 seconds Postheat 30 seconds The typical shot weight for a 9 Litre cylinder is 430g. This produces a coating of thickness of around 1mm.
These values are only intended as a guide and will vary according to metal thickness and type.
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 665HFis supplied as a finely divided powder. Whilst there are no known health hazards associated with PPA 665HF, 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 HS501, available on request. |
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 400 micron coating applied under standard conditions onto 3mm thick steel plate. All the tests are performed at 23°C unless otherwise specified.
|
Recommended Coating Thickness |
700-1200 microns |
|
|
Appearance |
Smooth, semi-matt |
|
|
Impact Strength |
Gardner (drop weight) ISO 6272 Direct 23°C |
1.0 Joules |
|
Abrasion |
Taber ASTM D4060/84 H18, 500g load, 1000 cycles |
160mg weight loss |
|
Salt Spray
|
ISO 7253 |
Results after 1000 hours: Adhesion lost up to 10mm from scribe mark. Less than 0.5mm under film corrosion. (A phosphated substrate will improve corrosion resistance). |
|
Chemical Resistance*
|
- Dilute Acids - Dilute Alkali - Salts - Solvents |
Good Good Good (except peroxides) Poor |
|
Safe Working Temperature |
(Continuous in air) |
+65°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 665 PPA 665XL PPA 571
Plascoat PPAs for fire extinguisher lining
Lining of fire extinguishers on a Falcon 24
| 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 |
PPA665HF/19/04/06 /Web