Powder injection molding (PIM)

Materials for Powder Injection Molding (PIM)

What is powder injection molding (PIM)?

PIM is a technique for manufacturing miniature high-precision metallic or ceramic components. In PIM, a metallic or ceramic powder is first blended with a binder, then injection molded, processed to remove binder components, and sintered.

PIM was developed in the U.S. during the 1970s as an advanced approach to powder metallurgy for manufacturing metal components; the technique combined conventional methods of powder metallurgy with injection-molding techniques for plastics. The traditional approach to powder metallurgy, known as press molding, involved inserting metal powders into molds and could only produce components with relatively simple shapes. In contrast, PIM fabricates metal components according to the same principles used in injection molding, allowing mass production of complex-shaped components.

What is Powder Injection Molding (PIM)?

Among the various types of resin used as PIM binders, polyacetal (also known as polyoxymethylene or POM) has a number of particularly valuable properties: it is easily processed, offers high dimensional stability and high mechanical strength, and exists as a crystalline resin with many physical properties that remain stable over a range of temperatures extending up to the melting point.  These properties of POM make it the primary choice for injection modeling of precision resin components such as gears—and carry over directly to the PIM domain when POM is used as a binder.​​

Asahi Kasei offers suitable binder products for both catalytic debinding and thermal debinding in powder injection molding (PIM).
In addition to TENAC™-C FF520, a binder resin for catalytic debinding, we have newly developed TENAC™-P PT220, a polymer binder suitable for thermal debinding.

Polyacetal copolymer for catalytic debinding tenac-c FF520

TENAC™-C FF520 polyacetal copolymer

"Tenac™-C FF520" is an ultra-high fluidity polyacetal copolymer developed as a binder suitable for catalytic debinding in powder injection molding (PIM)

Polyacetal (POM) is commonly used as a resin constituent of PIM binders due to the high strength of POM itself and its ability to decompose with no residue under application of acid or heat. Tenac™-C FF520 combines the superior mechanical properties of POM with the advantage of ultra-high flow.

Comparison of TENAC™-C FF520 properties vs. reference values for other resins used as PIM binders.
General Physical Properties
Sintered ISO2740 dumbbell fabricated using TENAC™-C FF520 (unpolished)
Sintered ISO2740 dumbbell fabricated using TENAC™-C FF520 (unpolished)

For more information, please download slides

We hope you will consider Asahi Kasei’s  Tenac™-C FF520 as an ideal match for your design needs. For more information,  please refer to the slides available from the download link below.

Polymer binder for thermal debinding TENAC-Pロゴ PT220

TENAC™-P PT220 polymer binder for thermal debinding

TENAC™-P PT220 is a grade developed as an only polymer binder suitable for thermal debinding in powder injection molding (PIM).

Using our alloying technology, multiple types of resins are aggregated and dispersed to reduce voids and residues in sintered parts. This grade is suitable for thermal debinding, which is often used for small parts.

Physical properties of PT220​ and properties of the sintered body
Physical properties of PT220​ and properties of the sintered body
Sintered JIS-2 dumbbell fabricated using TENAC™-P PT220 (unpolished)
Sintered JIS-2 dumbbell fabricated using TENAC™-P PT220 (unpolished)

For more information, please contact us.

If you require more detailed information or samples of TENAC™-P PT220, please contact us from below.

Related information

TENAC™ polyacetal resins

TENAC™ has excellent self-lubricating nature, fatigue behavior, and oil resistance. It is used in gears, bearings, automotive interiors and fuel parts.

Other Solutions