Exablend® POK GF30 G2 — 30% Glass Fiber Reinforced Polyketone for Precision Technical Parts

Exablend® POK GF30 G2 — 30% glass fiber reinforced polyketone for precision technical parts

Exablend® POK GF30 G2 is an engineering compound based on polyketone, reinforced with 30% glass fiber. The grade targets parts that require not maximum modulus at any cost, but a balanced combination of strength, stiffness, impact resistance, stable geometry and resistance to technical media.

Unlike highly filled grades with 50% GF, Exablend® POK GF30 G2 retains a wider processing window and a better balance between reinforcement and mechanical endurance. This makes the material suitable for series-molded parts where accuracy, service life, stable operation in humid or chemically active environments and control of post-molding deformation are important.

Engineering logic of the grade

POK GF30 G2 should be viewed as an intermediate engineering grade between unreinforced polyketone and high-stiffness GF50 compounds. Glass fiber increases the modulus, reduces shrinkage and improves shape stability, while the polyketone matrix retains the strengths of POK: low water absorption, chemical resistance, wear resistance and good behavior in parts involving friction, moisture, fuel or oils.

This grade is particularly useful for parts where polyamide may be too sensitive to moisture, POM does not provide the required stiffness or temperature margin, and excessive 50% GF reinforcement may be redundant due to impact requirements, complex geometry or molding processability.

Typical applications

• structural automotive parts;
• under-hood components;
• electrical and electronic housings;
• precision gears;
• technical elements with increased dimensional stability requirements;
• parts operating in contact with oils, fuel or technical fluids;
• assemblies where wear resistance, friction control and repeatable geometry are important.

Key advantages of Exablend® POK GF30 G2

• 30% glass fiber for increased stiffness and shape stability;
• tensile strength of 150 MPa;
• tensile modulus of 10 000 MPa;
• flexural modulus of 7 500 MPa;
• better impact behavior compared with stiffer highly filled grades;
• low linear shrinkage in the flow direction;
• HDT of 200 °C at 1.8 MPa load;
• resistance to chemical and fuel/oil environments;
• good suitability for precision molded parts with series repeatability.

Technical characteristics

The main physical, mechanical and thermal characteristics are given in the table below. When evaluating POK GF30 G2 it is important to look not only at strength or modulus, but at the full set of parameters: shrinkage, impact strength, HDT, stability in humid environments and the actual operating conditions of the part.

Processing recommendations

Exablend® POK GF30 G2 is intended for injection molding. The material processes well, but for stable part quality it is necessary to control drying, mold temperature, cavity filling and melt residence time in the barrel.

For reinforced POK it is important to take into account glass fiber orientation, the difference in shrinkage along and across the flow, weld line locations and wall thickness uniformity. These factors often determine not only mechanical strength but also the actual accuracy of the finished part.

What to consider when selecting the material

POK GF30 G2 is worth testing when a stiff but not excessively brittle structural part is required. The grade is well suited for projects that need a balance between reinforcement, impact endurance, dimensional stability and chemical resistance.

If the primary requirement is maximum stiffness and minimum deformation under load, POK GF50 should be considered. If the part has complex ribs, snap-fits, local stress concentrations or operates under cyclic loading, POK GF30 G2 is often the more balanced candidate for initial testing.