Plastic Reinforcement n and

Despite the poor showing of calcium polyphosphate fibers in reinforcing Portland Cement, calcium polyphosphate and sodium calcium polyphosphate fibers were tested in plastics. In these tests [Ca(P03)2]n fibers performed very well indeed. This was particularly true for epoxy resins. 

Sodium calcium polyphosphate fibers performed similarly to asbestos in phenol formaldehyde resins. It did not compare well to potassium titanate in polyester resins. [Ca(P03)2]n fibers, being developed by Abe in Japan, should perform much as potassium titanate, but without the hazards. 

Although Dr. Hinkebein s concept was promoted as an application of phosphate fibers, it should be useful with other fibers. It is believed that, with some additional research, a very satisfactory replacement for asbestos -cement pipe can 

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