PTFE Molding Powder-Filled Compound Powder

Catalog Number

ACMA00045228

Description

1. 100% Virgin PTFE molding free flow powder, non free flow fine powder;
2. Modify PTFE molding free flow fine powder;
3. PTFE filled compound powder NFF & FF;
4. PTFE micron fine lubricant powder;
5. PTFE pre-sintered powder;
6. PTFE finished products including rod, tube, film etc.

Appendix

PTFE Molding Powder-Filled Compound Powder
Fillier	Property	Standard Ingredient
Glass Fiber	Increase compressive strength Increase creep resistance Increase wear-resistance	85%PTFE+15%GL
		75%PTFE+25%GL
		80%PTFE+15%GL+5%GR
		75%PTFE+20%GL+5%GR
Carbon	Increase hardness Increase wear-resistance Improve thermal conductivity	85%PTFE+15%CAR+85%PTFE
		75%PTFE+25% CAR
		75%PTFE+23%CAR+2%GR
Carbon Fiber	Increase wear-resistance Increase hardness Increase resistance to bending	90%PTFE+10%CF
		85%PTFE+15%CF
Graphite	Reduce friction factor Improve sliding performance Improve thermal conductivity	90%PTFE+10%GR
		85%PTFE+15%GR
BRONZE	Increase hardness Increase wear-resistance Improve thermal conductivity Reduce code flow	60%PTFE+40%BRONZE
		40%PTFE+60%BRONZE
MoS2	Reduce friction Increase wear-resistance	80%PTFE+15%GL+5%M
		75%PTFE+20%GL+5%M
		55%PTFE+40%BR+5%M
Stainless Steel	Improve thermal conductivity Reduce code flow Chemical Resistance	55%PTFE+45%STST
		50%PTFE+50%STST
Organic polymer materials	Improve temperature tolerance Increase wear-resistance Reduce the damage to component	85%PTFE+15%EK
		85%PTFE+15%PI
		85%PTFE+15%PEEK
Pigment	Color recognition	Blue, Green, Yellow, Red, etc.

Case Study

Wear Resistance Study of Carbon Material Filled PTFE Composites

Makowiec, Mary E., and Thierry A. Blanchet. Wear, 2017, 374, 77-85.

Microfillers have been shown to significantly reduce the wear rate of PTFE, such as α-alumina and activated nanocarbon. This work explored the wear reduction properties of more carbon-based nanomaterials on PTFE, including functionalized and non-functionalized multi-walled carbon nanotubes and mesoporous nanocarbon. The results showed that carboxyl functionalized carbon nanotubes and mesoporous nanocarbons were both effective nanoscale fillers compared to non-functionalized multi-walled carbon nanotubes, and the wear rate of the composites was close to 10^-7 mm³/Nm.
Preparation of PTFE composites filled with carbon nanomaterials
· The preparation process of carbon nanomaterial-filled PTFE composites involves blending PTFE powder with various carbon fillers, including carbon nanotubes, mesoporous nanocarbon, and micrographite.
· The composite powders are mixed by hand and then with a Hauschild mixer, pressed into pucks, and sintered in a nitrogen environment at 360 °C for 3 hours.
· The sintered pucks are then cut into pins for testing in a reciprocating pin-on-flat tribometer. The pins undergo sliding against stainless steel countersurfaces at room temperature, with wear rates measured at various intervals. Steady-state wear rates are determined from the wear record, with a 95% confidence interval obtained for each data point.

Study on the Tribological Behavior of Graphite and Bronze Filled PTFE Composites

Valente, Caio Augusto Garcia Sampaio, et al. Tribology Transactions, 2020, 63(2), 356-370.

This work evaluates the effect of graphite and bronze fillers on the tribological behavior of PTFE, both of which significantly affect the coefficient of friction (COF) and mass loss.
Results of dry pin-on-disc wear test
· The addition of fillers had a significant impact on the coefficient of friction (COF) and mass loss compared to pure PTFE. The sliding distance required to reach steady-state COF was unaffected by any filler.
· Both the normal force and sliding velocity played a significant role in determining COF, with graphite reducing COF as a solid lubricant and bronze increasing COF, especially under conditions of lower normal force.
· Both composite materials showed variation in contact temperature based on test conditions, with a model considering friction-generated heat providing a good fit.
· Adhesion and abrasive wear mechanisms were observed for both composites, with PTFE+Bronze exhibiting more scratches due to a three-body abrasion mechanism involving hardened bronze wear debris. The fillers were key in improving the wear resistance of pure PTFE.
· Due to the presence of a soft phase in each composite, preferential wear occurred. In the case of PTFE+Graphite, graphite particles were easily sheared off initially due to their layered structure. Conversely, in PTFE+Bronze, wear primarily occurred in the PTFE matrix itself as it acted as the soft phase for this composite.

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