Process for incorporating organic fibrous fillers in elastomers

Details Process for incorporating organic fibrous fillers in elastomers Process for incorporating organic fibrous fillers in elastomers

1991-10-28

1993-04-27

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

264141, 264211, 264349, 523333, 523335, 523340, 523352, 524572, 524575, 524577, 528502, B29C 4700, B29C 4776

Patent

active

052059723

ABSTRACT:
Incorporating fibrous filler into an elastomer by adding to a screw extruder an aqueous slurry of an organic fibrous filler having a length less than about 25 mm and an elastomer latex, e.g., polychloroprene latex. The latex and slurry are fed to the extruder and the latex is coagulated in the extruder. The coagulated latex containing fibrous filler is fed to a dewatering zone. The flow of coagulated elastomer is restricted so that water present in the coagulated elastomer is separated by means of a vent in the extruder upstream from the restriction and discharging and recovering the fiber-filled elastomer. The compound can be used for the manufacture of power transmission belts.

REFERENCES:
patent: 3751527 (1973-08-01), Bortnick
patent: 4136251 (1979-01-01), Bice et al.
patent: 4263184 (1981-04-01), Leo et al.
patent: 4332760 (1982-06-01), Warfel
patent: 4588780 (1986-05-01), Edwards et al.

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