Metallocene Polypropylene WAYMAX™

Long-chain branched high melt-strength polypropylene (HMS-PP) using our original metallocene catalyst technology.

WAYMAX™ is a long-chain branched (LCB) high melt-strength polypropylene (HMS-PP) using an original metallocene catalyst technology developed by Japan Polypropylene Corporation.

Core Technology Details

Conventional HMS-PP is mainly produced by introducing a long-chain branched structure by denaturation using radiation or peroxide, which causes problems such as a significant decrease in melt strength after extrusion, inclusion of components (gel) that deteriorate the appearance of films and other products, and poor recyclability. However, we have succeeded in solving these problems by introducing a long chain branched structure using our original metallocene catalyst technology and polymerization technology.

WAYMAX™ has excellent melt properties derived from the structure described above and can also exhibit excellent heat stability at the same time due to the absence of a denaturation process.

These features enable stable and well-balanced expression of properties such as melt strength and recyclability even under mass extrusion conditions and are expected to greatly improve productivity in molding methods such as foam molding and thermoforming of large or deep-drawn parts, as well as stability of product properties. In the field of PP-based films, it is also expected to be used as a modifier due to its extremely low gel and greatly improved film-forming properties.

WAYMAX™ Performance

High melt-strength PP with excellent total performance.

Excellent melting characteristics

Excellent melting characteristics

Excellent balance between melt strength and flowability.

It exhibits high strain-hardening properties.

Molding stability

Suppression of neck-in and draw resonance can improve productivity

Compared to cross-linked HMS-PP, there is less increase in MFR and decrease in melt strength during repeated extrusion, resulting in excellent molding stability and recyclability.
It is also cleaner than cross-linked HMS-PP, with less volatile gas emissions.

Bubble stabilization in air-cooled inflation film molding

General PP(MFR=7)

WAYMAX™ MFX3(5% added)

Application examples

This is examples of product applications that takes advantage of the characteristics of WAYMAX™.

Foam Container Applications

Foam Container Applications

Injection foaming applications

Injection foaming applications

Thermoforming applications

Thermoforming applications

Decorative Film Applications

Decorative Film Applications

Grade list/Download

Physical properties of WAYMAX™

  Grade MFX8 MFX6 MFX3 EX6000 EX4000
Items Unit Test Method
MFR g/10min ISO 1133 1.3 2.8 8.0 2.9 6.0
Density g/cm3 ISO 1183 0.9 0.9 0.9 0.9 0.9
Melt Strength @ 230degC g JPP Method 25 17 6 9 5
Flexural Modulus MPa ISO 178 2,200 2,250 2,200 1,800 1,750
Flexural Strength 58 60 58 49 48
Tensile Modulus MPa ISO 527-1 2,050 2,050 2,050 1,700 1,650
Tensile Stress @ Yield 41 41 40 35 34
Nominal Tensile Strain % 10 20 20 100 100
Charpy Impact Strength @ 23degC kJ/m2 ISO 179 4.0 4.0 4.0 10 9.0
Charpy Impact Strength @ 0degC 1.5 1.0 1.0 4.5 4.0
Rockwell Hardness --- ISO 2039-2 100 100 100 90 100
Heat Deflection Temperature @ 0.45MPa Load degC ISO 75 120 120 120 110 110
Heat Deflection Temperature @ 1.80MPa Load degC ISO 75 65 65 65 60 60
PL confirmation certificate for food applications (JPN) Approved Approved Approved Approved Approved
  • This is a typical data, not to be construed as specification.
  • Application suitability should be confirmed with the final product by referring to the physical property values.


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We will propose the best solution for our customers.


Japan Polychem Corporation
Japan Polyethylene Corporation