Highly filled injection moldable polyetherketones

A polymer composite for molding articles having improved strength and resistance to heat distortion, formed from a homogenous mixture comprising:

• a) a partially crystalline and partially amorphous polyaryletherketone polymer,
• b) a reinforcing fiber for providing strength and stiffness, said reinforcing fiber comprising less than 25% by volume of the article.
• c) a non-thermoplastic immobilizing filler for immobilizing the amorphous portion of the polyaryletherketone polymer, said immobilizing filler being selected from the group consisting of equi-axed and platelet shaped materials;
• and
• d) said reinforcing fiber and said immobilizing filler forming at least 40% by volume of the composite and raising the heat distortion temperature of the composite at 264 psi to above 300.degree. C. and within 20.degree. C. of the crystalline melting point of the polyaryletherketone polymer and having a melt viscosity of less than 10,000 poise at 1000 sec.sup.-1 at 430.degree. C.

A polymer composite for producing melt processable articles having improved strength and resistance to heat distortion formed from a homogenous mixture comprising:

• a) a partially crystalline and partially amorphous polyaryletherketone polymer,
• b) a reinforcing fiber filler for providing strength and stiffness, said filler comprising less than 25% by volume of the article.
• c) a platelet shaped immobilizing filler for immobilizing the amorphous portion of the polyaryletherketone polymer, and
• d) said reinforcing fiber and said immobilizing filler forming at least 40% by volume of the composite and raising the heat distortion temperature of the composite at 264 psi to above 300.degree. C. and having a melt viscosity of less than 10,000 poise at 1000 sec.sup.-1 at 430.degree. C.