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+61 (0)2 9630 0022
Email: sales@fluoropacific.com


Moulded Shapes

 

Since the early 70’s, Fluoro Pacific has been manufacturing polytetrafluoroethylene (PTFE) stock shapes in Sydney Australia. We have the distinct advantage of compounding our own resin formulations tailoring our finished products to specific end use applications. We can produce virtually any compound including glass, bronze, MoS2, carbon, ceramic, carbon fibre, graphite and stainless, in virgin  or modified PTFE and various PEEK grades


We have the capability to manufacture and supply PEEK cylinders and PTFE stock shapes in the following configurations:

• Compression moulded cylinders, sheet and rods

• Isostatically moulded tubes and rods

• Ram extruded rods and tubes

• Skived PTFE tape

• Etched tape & parts


MANUFACTURING CAPABILITIY

Rod – Isostatically Moulded (mm) 10 Ø to 80 Ø x 2m long Centreless ground

Rod – Compression Moulded (mm) 70 Ø to 205 Ø x 150/300mm long

Rod – Ram Extruded (mm) 10 Ø to 150 Ø x 1m long

Tube - Isostatically Moulded (mm) 70 Ø OD to 85 Ø OD x 1m long, 20 Ø ID to 50 Ø ID x 1m long

Tube - Compression Moulded (mm) 56 Ø OD to 639 Ø OD x 150/300mm long, 23 Ø ID to 600 Ø ID x 150/300mm long *Other sizes available on an import basis

Sheet – Compression Moulded (mm) 610 x 610 – 10mm to 60mm thick, 1200 x 12200 – 3mm to 25mm thick *Other sizes available on special order

Skived Tape (mm) 1200 wide – 0.25mm to 3.0mm *Other sizes available on special order


The differing manufacturing processes and our capabilities are explained below:

COMPRESSION MOULDING Using metal tube moulds for solid rod and cylinders and steel block moulds for sheet, PTFE powder is loaded into the mould and compressed under vertical pressure in a hydraulic press for a specified time delivering the desired shape (known as a preform). It is then stripped from the mould, cooked (sintered) in a hot air oven and then cooled gradually to deliver the finished product. Rod, sheet & cylinders are manufactured using this process.


ISOSTATIC MOULDING 
Isostatic moulding is accomplished by compressing PTFE powder in a pressure vessel consisting of a metal tube with a silicone rubber internal bladder that is inflated with very high hydraulic pressure, causing the PTFE powder to be compressed radially (equally from all directions rather than from the ends as per compression moulding.). The desired shape (known as preform) is extracted and then cooked (sintered) in a hot air oven. Rod & tubes are manufactured using this unique process and is far superior to ram extruded products as Isostatic moulding guarantees consistent physical properties across each length of product. This is imperative for small part production runs particularly where application performance and dimensional stability is critical.


RAM EXTRUSION 
PTFE cannot be extruded like traditional polymers due to its very low coefficient of friction and high melt viscosity. Commonly known as a non-melt processable polymer, PTFE can be extruded at slow rates using ram extrusion. PTFE powder is compacted by a ram, forced into a die, heated to its processing temperature and then moulded under high load into the desired shape.  


SKIVING 
Skived sheet, rolls and tapes are produced by peeling a PTFE cylinder using a similar process to manufacturing wood veneers. A PTFE cylinder is pressed onto a mandrel and mounted onto a lathe. A special cutting tool is mounted onto the cross slide which at a constant speed advances towards the PTFE cylinder skiving off a continuous film at a constant thickness.


ETCHING 
Due to the low surface tension of PTFE, nothing sticks to it, giving PTFE the lowest coefficient of friction of any known solid material. It is possible to adhere PTFE through a process which alters the molecular structure known as etching. The only element to react with PTFE is sodium metal which in a controlled environment strips away the fluorine atoms from the PTFE resulting in a surface that is bondable. At Fluoro Pacific we have an etching plant that is environmentally safe and capable of etching sheet, skived tape and machined parts.