Title:
STAMPABLE SHEET
Document Type and Number:
WIPO Patent Application WO/2014/065161
Kind Code:
A9
Abstract:
A stampable sheet comprising discontinuous carbon fibers and a thermoplastic matrix resin, the stampable sheet characterized in that the viscosity η of the stampable sheet in a state in which the matrix resin in the stampable sheet is molten is in the range of η0 ≤ η <η0exp (0.20 Vf) (Pa·s), and the ratio Z of opened carbon fiber bundles (A) in which Mn/(Ln × D) is less than 8.5×10-1 (mg/mm2) with respect to the total weight of carbon fibers is in the range of 10 ≤ Z < 70 (wt%). Here, η is the viscosity at a temperature 50°C higher than the solidification start temperature of the matrix resin, Vf is the carbon fiber content (%) per unit volume of the stampable sheet, η0 is the viscosity of the matrix resin, Mn is the weight of a carbon fiber bundle, Ln is the fiber length of the carbon fibers, and D is the diameter of the carbon fibers. This configuration makes it possible to provide a stampable sheet provided with the optimum range of conditions, and to achieve both high fluidity during molding and high mechanical characteristics after molding.
Inventors:
MIYOSHI KATSUHIRO (JP)
SHIMADA TAKASHI (JP)
HASHIMOTO TAKAFUMI (JP)
OHARA TETSUYA (JP)
NARUSE YOSHIHIRO (JP)
SHIMADA TAKASHI (JP)
HASHIMOTO TAKAFUMI (JP)
OHARA TETSUYA (JP)
NARUSE YOSHIHIRO (JP)
Application Number:
PCT/JP2013/077973
Publication Date:
March 12, 2015
Filing Date:
October 15, 2013
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
C08J5/06; B29B11/16
Attorney, Agent or Firm:
BAN Toshimitsu et al. (JP)
Toshimitsu Ban (JP)
Toshimitsu Ban (JP)
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