Molded Product Having Thickness Gradient, and Method for Manufacturing the Same
AssigneeTeijin Limited
InventorsMichiharu Taniguchi, Masaru Sato, Koji Suzuki, Toru Sugiyama, Yasunori Nagakura, Motoomi Arakawa
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Abstract
A molded product, including a fiber-reinforced composite material containing reinforcing fibers having an average fiber length of 5 mm to 100 mm and a thermoplastic resin, wherein the molded product has thickness gradient, an amount of the thermoplastic resin is 10 to 1,000 parts by weight per 100 parts by weight of thee reinforcing fibers, and the reinforcing fibers have a fiber areal weight of from 25 g/m2 to 3,000 g/m2 and are substantially two-dimensionally randomly oriented.
Claims11
A molded product, comprising a fiber-reinforced composite material containing reinforcing fibers having an average fiber length of 5 mm to 100 mm and a thermoplastic resin,
- wherein the molded product has thickness gradient,
- an amount of the thermoplastic resin is 10 to 1,000 parts by weight per 100 parts by weight of the reinforcing fibers,
- the reinforcing fibers contain a reinforcing fiber bundle (A) comprising the reinforcing fibers of a critical single fiber number defined by formula (1) or more, a ratio of the reinforcing fiber bundle (A) to a total amount of the reinforcing fibers is 20 vol % to 99 vol %:
- Critical single fiber number=600/D (1)
- wherein D is an average fiber diameter (μm) of single reinforcing fibers, and
- the reinforcing fibers have a fiber areal weight of from 25 g/m2 to 3,000 g/m2 and are substantially two-dimensionally randomly oriented.
Dependencies are inferred from the claim text.