PTFE Fine Powder · CAS 9002-84-0

PTFE Fine Powder Supplier in China

Huafluoro is a professional fluoropolymer manufacturer in China, supplying high-performance PTFE Fine Powder for paste extrusion, tubing, wire & cable insulation, sealing materials, and industrial applications requiring excellent chemical resistance and thermal stability.

✓ Exceptional Thermal Stability

✓ Outstanding Chemical Resistance

✓ Excellent Paste Extrusion Performance

What is PFA？

PTFE fine powder is in the form of white powder with excellent chemical resistance, lubricantproperties, wide service temperature range, and dielectric performance. It can be processed bypaste extrusion.

Grade	Average Particle Size	Tensile Strength ≥ (Mpa)	Elongation ≥ (%)	Process	SSG	Applications
HF-14	550±150	30	330	Paste extrusion	≥ 2.191	Sealing tape, staple fiber
HF-14G	550±150	30	330	Paste extrusion	2.151-2.190	Pipes, large size coaxial cables, staple fiber
HF-14T	550±150	32.5	330	Paste extrusion	≤ 2.156	Biaxially stretched film
HF-16	550±150	32.5	330	Paste extrusion	2.151-2.180	Filament yarn, Biaxially stretched film
HF-16T	550±150	32.5	330	Paste extrusion	≤ 2.150	Biaxially stretched film
HF-32	550±150	30	330	Paste extrusion	2.145-2.170	Pressure-resistant transparent tube

Package: 25kgs plastic drum, 20kgs paper drum.

Storage and Handling: PTFE fine powder must be handled carefully to avoid excessive shearing and particle fibrillation.Fibrillation is not reversible and damaged particles can appear as defects in the finished product. It must be handled below19°C because above this temperature the powder is softer and can be more easily laminated. It is recommended sieving ofpowders below 19°C before adding lubricant. Strong vibrations and shocks must be avoided as much as possible for preventlumps formation. Storage and transportation should be carried outin the range 5-19°C. Moreover, the powders must be storedon a dry room because the absorption of moisture could negatively affectits processing. Storage and handling facilities shouldbe clean since even housekeeping and careful handing are essential.

Applications of PTFE Fine Powder

PTFE fine powder is one of the most versatile fluoropolymer forms, but it is not a final product itself—it is mainly a processing material used to make films, tapes, coatings, and molded parts.

1. Skived PTFE Tape

Process: paste extrusion → preform → skiving
Used for:
- Wire and cable insulation
- High-temperature wrapping tape
- Electrical insulation in transformers and motors
Key advantage: excellent dielectric strength + continuous use at 260°C

2. Gasket & Sealing Materials

Expanded PTFE (ePTFE) or filled PTFE tapes
Used in:
- Chemical pipelines
- Flanges
- Pumps and valves
Key advantage: chemical resistance + non-stick + sealing under pressure

3. Molded PTFE Parts

Compression molding + sintering
Used for:
- Insulating spacers
- Bearing components
- Electrical structural parts
Key advantage: high purity + low friction + thermal stability

4.Electrical Insulation Components

Used in:
- Transformer insulation parts
- Coil bobbins
- High-voltage spacers
Key advantage: stable dielectric performance in harsh conditions

PTFE Fine Powder Resin Processing

1. What is PTFE Fine Powder?

PTFE fine powder is:

A high molecular weight fluoropolymer resin
Produced by emulsion polymerization
Appearing as fine white powder
Non-melt-processable (does not flow when heated)

2. Typical Processing Steps

1. Preforming

PTFE fine powder is:

Mixed with a processing aid (lubricant)
Cold-compressed in a mold

This forms a “green” preform with basic shape but low strength.

2. Forming (Paste Extrusion or Compression Molding)

Depending on the final product:

Paste Extrusion
- Powder mixed with lubricant and extruded
- Used for tubes, tapes, films
Compression Molding
- Powder pressed into shapes under high pressure
- Used for gaskets, seals, blocks

3. Lubricant Removal

The processing aid is removed by heating or drying
Prepares the material for sintering

4. High-Temperature Sintering

This is the key stage:

Temperature: around 360–380°C
PTFE particles fuse together without true melting
Polymer chains coalesce into a dense solid structure

5. Controlled Cooling

Slow cooling is required
Ensures dimensional stability and avoids internal stress

FAQ of PTFE Fine Powder

1. What is the difference between PTFE Fine Powder and PTFE Molding Powder?

PTFE Fine Powder is designed for paste extrusion processes.
PTFE Molding Powder is mainly used for compression molding and ram extrusion.

Fine powder has smaller particle size and better fibrillation performance.

2. Is PTFE Fine Powder melt-processable?

No. PTFE Fine Powder is a non-melt-processable fluoropolymer.
It does not flow like conventional plastics during heating and must be processed through cold forming and high-temperature sintering.

3. What are the main applications of PTFE Fine Powder?

Typical applications include:

PTFE thread seal tape
Wire & cable insulation
PTFE tubes and hoses
Expanded PTFE (ePTFE)
Gaskets and sealing materials
Chemical-resistant linings

4. What is paste extrusion?

Paste extrusion is a processing method where PTFE fine powder is mixed with lubricant, compressed into a preform, and extruded into continuous shapes such as tapes or tubes.

5. What temperature is required for PTFE sintering?

PTFE is typically sintered at approximately:

360–380°C

This allows PTFE particles to fuse into a dense structure.

6. Does PTFE Fine Powder have good chemical resistance?

Yes. PTFE offers outstanding chemical resistance against:

Strong acids
Strong alkalis
Organic solvents
Corrosive chemicals

It is widely used in harsh chemical environments.

PTFE Powder