Patents Assigned to Polyplastics Co., Inc.
  • Patent number: 5718858
    Abstract: Apparatus and methods are provided for producing a long fiber-reinforced thermoplastic resin compositions by initially loosening a continuous fiber bundle by a fiber loosening device so as to form a moving web-like continuous fiber bundle. At least one side of the moving web-like continuous fiber bundle which passes through the die is coated with a thermoplastic resin melt extruded through a slit disposed in the die by an extruder. The slit has substantially the same width as that of the web-like continuous fiber bundle to provide an even supply of the resin melt in the width direction of the web-like continuous fiber bundle. However, the slit has a spacing which changes at a point in the widthwise direction of the web-like continuous fiber bundle so as to be increased as the point is more remote from a feed port and have a constant spacing in the flowing direction of the thermoplastic resin melt.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: February 17, 1998
    Assignee: Polyplastics Co., Inc.
    Inventors: Yoshimitsu Shirai, Motohito Hiragohri, Takeshi Amaike, Haruji Murakami
  • Patent number: 5639410
    Abstract: Apparatus and method for manufacturing a resin structure reinforced with long fibers. A continuous fiber bundle is impregnated with a resin melt while the fiber bundle is being drawn continuously. Thereafter, the continuous resin-impregnated fiber bundle is shaped so as to have a cross-section of the intended final product. The shaped resin-impregnated fiber bundle is then cut at a downstream location. Shaping of the resin-impregnated fiber bundle is accomplished by a plurality of rolls, each having grooves formed on the outer periphery thereof which receive the continuous resin-impregnated fiber bundle. The grooves and the rolls are arranged such that the rolls are placed, in an alternating manner, at upper and lower positions with respect to the fiber bundle which is being drawn and such that the grooves of the rolls on the elevation plane perpendicular to the running direction of the fiber bundle forms a shape of the cross-section of the intended final product.
    Type: Grant
    Filed: September 11, 1995
    Date of Patent: June 17, 1997
    Assignee: Polyplastics Co., Inc.
    Inventors: Takeshi Amaike, Yoshimitsu Shirai
  • Patent number: 5185392
    Abstract: A polyarylene sulfide resin composition useful for molded parts comprises (A) 100 parts by weight of a polyarylene sulfide, (B) 0.01 to 10 parts by weight of an organic bisphosphite of the formula: ##STR1## in which R.sub.1 and R.sub.2 are each an alkyl, an alkyl having at least one substituent, an aryl, an aryl having at least one substituent or an alkoxy, (C) 0 to 400 parts by weight of an inorganic filler and (D) 0.01 to 5 parts by weight of at least one alkoxy silane.
    Type: Grant
    Filed: December 26, 1990
    Date of Patent: February 9, 1993
    Assignee: Polyplastics Co., Inc.
    Inventors: Toshifumi Nonaka, Toshikatsu Nitoh, Andrew Auerbach
  • Patent number: 4719171
    Abstract: An optical disc comprises a substrate formed from a polymer being capable of the anisotropic melt phase and being melt-processable, a recording layer having pits and grooves, formed on the substrate, and a metal coating layer, formed on the recording layer.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: January 12, 1988
    Assignee: Polyplastics Co., Inc.
    Inventors: Yukio Ikenaga, Katsuhiko Takahashi, Tsuneyoshi Okada, Kenji Hijikata, Toshio Kanoe