ipcm® n. 64 - July/August 2020

Page 97

RAW MATERIALS

P

art of the Chemours family of

- Greases: PTFE Micropowders

fluoropolymers, this product

properties, such as chemical

is a white, free-flowing

inertness and non-flammability, are

polytetrafluoroethylene (PTFE) resin

key elements for greases to obtain

used as an additive in other materials

approval to operate in environments

and systems.

where gases and other hazardous

Unlike PTFE granular and fine powders,

products are present.

Zonyl™ PTFE Micropowders have: - Smaller particle sizes ranging from 2 to 20 μm;

- Coatings: The main benefits provided by Zonyl™ Micropowders are abrasion resistance and anti-friction properties,

- Lower molecular weight;

especially important on coatings for

- Different particle shapes and

Industrial applications.

morphology designed to easily blend with other materials.

- Paints: the addition of PTFE Micropowders helps paints have

Depending on how they are handled

easier cleanability thanks to improved

and processed, Zonyl™ Micropowders

anti-fouling properties, and present

provide non-stick properties and

easier higher spreading rate thanks to

improve lubricity, wear resistance, and

the extra lubricity provided.

reinforcing properties.

Most PTFE Micropowders are made

Zonyl™ Micropowders are primarily

through a controlled irradiation or

intended for use as additives in

thermal degradation of PTFE feedstock

mixtures with other solid or liquid

to produce a low molecular weight

materials that can:

PTFE. This irradiation process has

- Enhance abrasion resistance;

the potential to produce low levels of

- Reduce the coefficient of friction and

perfluoroalkyl carboxylic acids in the

mechanical wear;

presence of oxygen and moisture,

- Reduce surface contamination.

one of which is perfluorooctanoic acid

- Modify appearance.

(PFOA).

A wide variety of industries depend

Recently, the EU has taken measures

on PTFE Micropowders for specific

to regulate PFOA, its salts and

benefits, such as their ability to infuse

related substances in a wide range

hosts with some of PTFE’s more unique

of products under the EU REACH

properties.

program. The new regulation requires

Some applications include:

that, subject to certain exceptions,

- Thermoplastics: parts made with

as of July 4, 2020, mixtures and

the addition of Zonyl™ Micropowders,

articles placed on the market in the

like gears, benefit from improved

European Union will have to meet

wear resistance, reduced friction, and

the concentration limits set under

elimination of stick-slip behaviour.

Annex I to Regulation (EU) 2019/1021

- Elastomers: Standard elastomer

(EU Persistent Organic Pollutants

processing methods can be used

Regulation).

to incorporate PTFE Micropowders

Based on rigorous testing of

to enhance wear resistance, reduce

representative samples, Chemours™

friction and facilitate mould release.

Zonyl™ PTFE Micropowders comply

- Lithographic, flexographic, and

with Annex I to Regulation (EU)

gravure inks: Zonyl™ Micropowders

2019/1021. Currently Chemours™

give better image protection and

has multiple Micropowders offerings

higher productivity, on top of better

that contain less than 25 ppb of

slip and surface smoothness.

PFOA.


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