Fiber reinforced thermoplastic resin molded product having a good surface appearance
AssigneeKabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
InventorsRyosaku Kadowaki, Koichi Hashimoto, Toshihiro Asai, Toshiaki Okumura
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Abstract
A fiber reinforced thermoplastic resin molded product having a good surface appearance; fiber reinforced thermoplastic resin pellets useful for making fiber reinforced thermoplastic resin molded products; and processes for making fiber reinforced thermoplastic resin molded products and processes for producing fiber reinforced thermoplastic resin pellets.
Claims6
A fiber reinforced thermoplastic resin molded product comprising a thermoplastic resin as a matrix polymer and glass fibers as reinforcing fibers, and having a good surface appearance,
- wherein the glass fibers are contained in an amount of 2 to 20 vol % of the molded product, the weight average fiber length of the glass fibers present in the molded product is from 0.8 to 1.8 mm, the glass fibers of 2 mm or more in length are contained in an amount of 20 or less wt % of the total glass fibers, and the glass fibers of 3 mm or more in length are contained in an amount of 5 or less wt % of the total glass fibers.
A fiber reinforced thermoplastic resin pellet comprising a thermoplastic resin as a matrix polymer and glass fibers as reinforcing fibers,
- wherein the length of the pellet is about 2 to 12 mm, the glass fibers having substantially the same length as the pellet is contained in an amount of 20 to 60 vol % of the total pellet, in the state of aligned or twisted fibers along the longitudinal direction of the pellet, and L/D2 is 0.45 or more and L/D is from 1.1 to 6 wherein L represents the length of the pellet and D represents the diameter thereof.
Dependencies are inferred from the claim text.