Filled thermoplastic containing fibrous dispersion aid
Method for additive feeding
Injection of additives into liquid streams
Process for the manufacture of a glass fibre-reinforced plastics article and a glass fibre paste or slurry for use in the process
Thermoplastic glass fiber-reinforced polyamide molding material Patent #: 4657952
ApplicationNo. 179346 filed on 04/08/1988
US Classes:264/101, VACUUM TREATMENT OF WORK264/211.21, Screw extruder or screw feeder device264/211.23, Plural screws, plural extruders, or plural stage extruder264/328.18, Mixing of filler, dye, or pigment264/349MISCELLANEOUS
ExaminersPrimary: Lorin, Hubert C.
Attorney, Agent or Firm
Foreign Patent References
International ClassB29C 047/00
AbstractA method for adding intact fiber reinforcing material into thermoplastic resin compositions for toughening purposes without breakage of the fibers, including blending a polymeric solution and chopped fibers in a mixture at low to medium shear, injecting the resulting mixture into an extruder with a resin to be reinforced at an entry point positioned very near a vacuum point, and then removing the solvent for recycle while the reinforcing glass fiber and polymer blend is extruded.
Field of SearchMATRIX ADMIXED WITH SYNTHETIC FIBER
TREATING OR PREPARING A NONAQUEOUS DISPERSION OR EMULSION OF A SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT
TREATING OR PREPARING A NONAQUEOUS SOLUTION OF A SOLID POLYMER OR SPECIFIED INTERMEDIATE CONDENSATION PRODUCT
Admixing a nonreactive additive ingredient in the form of a slurry, dispersion, or suspension (liquid-solid); said slurry dispersion or suspension containing no solid polymer or SICP
Utilizing plural mixing operations of specified varying intensity, e.g., intensity of each mixing is reduced, etc.
Utilizing plural discrete pressures different than ambient
Utilizing plural interconnected distinct forming or treating zones or locations other than nominal screw extruder, e.g., zones interconnected in parallel or having varying flow velocity, etc.
Utilizing plural mixing operations in preparation of a solid polymer inert ingredient concentrate, e.g., master batch, etc.
Utilizing multistage coagulation of a solid polymer latex
Utilizing plural discrete mixing operations in specifically described distinct noninterconnected zones
With reinforcement filler, or additive
Utilizing added agent (e.g., flux, plasticizer, dispersing agent, etc.)
Mixing of filler, dye, or pigment
VACUUM TREATMENT OF WORK
By direct application of vacuum or pneumatic pressure
Screw extruder or screw feeder device
Plural screws, plural extruders, or plural stage extruder