(1) Chopped strand chopped strands are divided into dry chopped strands and wet chopped strands. The former is used in the production of reinforced plastics while the latter is used in papermaking. The chopped strands used for FRP are further classified into two types: chopped strands for reinforcing thermosetting resins (BMC) and chopped strands for reinforcing thermoplastic resins. The requirement for reinforcing chopped strands of thermoplastics is to use alkali-free glass fiber, which has high strength and good electrical insulation. The chopped strands have good bundling properties, good fluidity and high whiteness. Reinforced thermosetting plastic chopped strands require good bundleability, easy to soak the resin quickly, and have good mechanical strength and electrical properties.
(2) Grinding fiber The ground fiber is obtained by grinding a chopped fiber by a hammer mill or a ball mill. The ground fiber is mainly used as a reinforcing material in the Reinforced Reaction Injection Process (RRIM), and is used as a filler for the resin in the manufacture of products such as cast articles, molds, etc. to improve surface cracking, reduce mold shrinkage, and also be used as reinforcement. material.
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