• CASE03

    Coating modifier

    Improved durability and sliding properties for coatings, along with matting effects

Characteristics of MIPELON coating usage

Abrasion resistance, sliding properties, chemical resistance

Examples of use and evaluation

Automotive components, electronic devices, sliding coatings for industrial products

Issues with current materials in the field of coating additives

PTFE is widely used for the purpose of modifying the sliding properties of coatings However, various research has shown that PFOA, a chemical substance used in the manufacturing of PTFE, may cause harm to humans. While PFOA-free PTFE products have appeared on the market, there has been a growing need for PTFE alternatives due to the trend of increasing regulations on PFOA alternatives, especially in Europe.


MIPELON from Mitsui Chemicals is a fine-particle ultra-high molecular weight polyethylene. By using MIPELON as a coating additive, the abrasion resistance and sliding properties of a coating is improved. Additionally, since MIPELON is a polyethylene, it boasts high safety and complies with FDA standards. MIPELON is characterized by its spherical particles which have a narrow size distribution. The below figure is an SEM image of MIPELON, showing the spherical shape of the particles and highly uniform particle size distribution.  MIPELON particles range 10 - 60 μ in diameter, which enables the use of different particle sizes based on the coating.

Spherical particles
Spherical particles which have a narrow size distribution

Abrasion resistance of coatings

Additionally, the particles themselves are very slippery making them low-friction substances compared with PTFE or nylon beads. To further test and compare the performance of MIPELON as a coating additive, an EPDM sheet was coated using a primer. Next, the sheet was coated with a water-based coating, to which a 10% sliding additive was added along with a dispersant, and the abrasion coefficient of the coated rubber sheet with glass was measured. The figure shows the change in the friction coefficient based on the number of reciprocations for various additives. While PTFE and PE waves demonstrates a low initial coefficient, the abrasion coefficient increases as time passes. Although PA12 does not show a significant change at 5,000 reciprocating movements, MIPELON PM200 always demonstrates an extremely low friction coefficient. This means that MIPELON improves the slipperiness of rubber greater than PTFE, PA and PE wax, and demonstrates superior durability to PE wax and PTFE.

Measured values for friction coefficient

The sliding mechanism of MIPELON

The excellent properties of MIPELON as a friction-reducing additive are due to the spherical shape of MIPELON particles, their smooth surfaces, and the outstanding abrasion resistance of UHMW-PE materials. While minimizing the contact area with glass, the particles do not scrape off, maintaining their spherical shape. By doing so the abrasion resistance can reduce friction and improve durability. The surface of PTFE particles is rough, which makes them susceptible to wear, and the friction coefficient increases as the contact area increases due to abrasion. The below figure illustrates this action.

The sliding mechanism of MIPELON™

Matting effects of MIPELON

In addition to abrasion resistance and improved sliding properties, MIPELON demonstrates a matting effect even when a small amount is added to a coating. The figure shows an acrylic coating where 10% MIPELON has been added to an ABS resin, and it is clear that a matting effect has been produced.

Matting effects of MIPELON™


MIPELON can improve abrasion resistance and reduce the friction coefficient of a coating. Additionally, due to its high molecular weight and spherical particle shape, it gives coatings high durability. Moreover, MIPELON boasts a superior friction coefficient to other additives such as PTFE and also has a matting effect. Possessing wide-ranging functions as a sliding additive, MIPELON possesses superior properties as a coating additives that alternatives find it difficult to replicate.

Other examples of use