Method of blending reinforcing fibers and molding resins and product thereof

Abstract

Abstract THERE IS DISCLOSED A METHOD OF BLENDING REINFORCING FIBERS AND THERMOPLASTIC MOLDING RESINS, THE MOLDING MIXTURE RESULTING THEREFROM BEING USEFUL IN INJECTION MOLDING AND THE LIKE, THE RESIN COMPRISES FROM ABOUT 60 TO ABOUT 93 PARTS BY WEIGHT OF THE MIXTURE AND HAS A PARTICLE SIZE IN THE RANGE FROM ABOUT 125 MESH TO ABOUT 1/8 INCH, THE FIBERS COMPRISES FROM ABOUT 7 TO ABOUT 40 PARTS BY WEIGHT OF THE MIXTURE AND HAS A LENGTH IN THE RANGE FROM ABOUT 125 MESH TO ABOUT 1/2 INCH, AND A DISPERSAT IS PROVIDED IN THE MIXTURE COMPRISING FROM ABOUT 0.1 TO ABOUT 0.5 PART BY WEIGHT OF THE MIXTURE AND BEING COMPATIBLE WITH BOTH THE RESIN AND THE FIBER AND LEAVING SUBSTANTIALLY UNCHANGED THE NATURE OF THE MOLDED COMPOUND FORMED THEREFORM, THE RATIO BY WEIGHT BETWEEN THE RESIN AND THE FIBER BEING IN THE RANGE FROM ABOUT 1.5:1 TO ABOUT 15:1 AND THE RATIO BY WEIGHT BETWEEN THE DISPERSANT AND THE FIBER BEING IN THE RANGE FROM ABOUT 1:200 TO ABOUT 1:15, THE FIBERS AND THE DISPERSANT ARE MIXED IN A COMMERCIAL BLENDING MACHINE FOR A TIME INTERVAL OF FROM ABOUT 1 TO ABOUT 3 MINUTES SO AS TO UNIFORMLY TO DISPERSE THE DISPERSANNT ON THE SURFACE OF THE FIBERS, AND THEREAFTER THE RESIN IS ADDED THERETO AND THE INGREDIENTS MIXED FOR A TIME INTERVAL OF FROM ABOUT 5 MINUTES TO ABOUT 15 MINUTES TO PRODUCE THE MOLDING MIXTURE, WHEREBY TO PROVIDE A MOLDING MIXTURE WHEREIN THE RESIN AND THE FIBER AND THE DISPERSANT ARE THROUGHLY MIXED AND DISPERSED THROUGHOUT THE BODY OF THE MIXTURE SO AS TO MAINTAIN THE RESIN AND THE FIBER IN A UNIFORMLY DISPERSED RELATIONSHIP DURING THE STORAGE OF THE MOLDING MIXTURE AND DURING THE HANDLING AND MOLDING OF THE MOLDING MIXTURE INTO A MOLDED COMPOUND.

Inventors

• 👤 M Levine

Bibliographic Details