公开(公告)号：JPH10328332A

公开(公告)日：1998-12-15

申请号：JP15583497

申请日：1997-05-29

Applicant: TORAY INDUSTRIES

Inventor： ISOI SHINYA ,  NISHI YASUHIRO

IPC: A63B49/10

Abstract: PROBLEM TO BE SOLVED: To provide a racket which has a high repulsion, is light-weight, and has a favorable swing-through property, of which the load to an elbow joint is less, and in addition, which is excellent in physical properties such as impact strength. SOLUTION: This racket is made of a fiber-reinforced plastic wherein a ratio n1 /n0 between a crossing point number n1 of a gut 5 where the dynamic rigidity becomes 2N/mm or higher when the vibration is detected at a location being 50 mm from the end of a grip 3 of the racket frame by impulse-exciting the crossing points of the gut 5, and a crossing point number n0 of the gut 5 for the overall face part 1, becomes n1 /n0 >=0.4, and the fiber-reinforced plastic comprises a matrix resin and a reinforcing fiber for the constitution. In this case, at least at one part in a range which is 160 mm or less from the end of the grip 3 of a bent pipe made of the fiber-reinforced plastic forming the frame, a straight pipe portion wherein the outer peripheral length in the direction which is orthogonal to the racket longitudinal direction is 90 mm or longer, is provided, and on the outside of the straight pipe portion, a grip protective member is directly wound.

公开(公告)号：JPH10151692A

公开(公告)日：1998-06-09

申请号：JP31055296

申请日：1996-11-21

Applicant: TORAY INDUSTRIES

Inventor： ISOI SHINYA ,  WADA HIROHIDE ,  NISHI YASUHIRO

IPC: A63B49/10 ,  A63B102/02 ,  B29C70/06 ,  B29C70/22 ,  B29C70/30 ,  B29K27/00 ,  B29K77/00 ,  B29K105/04 ,  B29K105/08 ,  B29L31/52 ,  B32B5/28 ,  B32B27/12 ,  B32B27/30 ,  B32B27/34

Abstract: PROBLEM TO BE SOLVED: To make the close adhesiveness of a core member and an FRP outer shell excellent to prevent the generation of unpleasant vibration or sound by constituting the core member of a fiber-containing foamed resin. SOLUTION: An FRP product has a core member 1 composed of a foamed resin containing fibers 2 and the FRP outer shell 4 formed to the periphery of the core member 1. Herein, the fibers 2 are added to the core member pref. in an amt. of 3-50wt.%, more pref., 5-10wt.%. The foamed resin constituting the core member is composed of a vinylidene chloride resin, an epoxy resin or a phenol resin. Especially, the vinylidene chloride resin is pref. The bulk density of the core member is pref. 0.03-0.5g/cm , more pref. 0.1-0.3g/cm .

公开(公告)号：JPH07223271A

公开(公告)日：1995-08-22

申请号：JP7981294

申请日：1994-03-24

Applicant: TORAY INDUSTRIES

Inventor： SEKIDO SHUNEI ,  MATSUURA RYOICHI ,  KYONO TETSUYUKI ,  NISHIMURA KAZUHIKO ,  YOSHIMURA KOSUKE ,  ISOI SHINYA ,  OHARA HARUO

IPC: A63B49/10 ,  B29C43/02 ,  B29C70/06 ,  B29C70/10 ,  B29C70/12 ,  B29C70/44 ,  B29K105/08 ,  B29L23/00 ,  B29L31/52 ,  B32B1/08 ,  B32B5/26 ,  C08J5/24 ,  F16L11/08 ,  F16L11/24

Abstract: PURPOSE:To produce an FRP bent pipe or racket having excellent characteristics and stable quality without producing a void, a pinhole and a resin flow defective part on the surface thereof. CONSTITUTION:A fiber reinforced plastic bent pipe or racket to be produced has an inner reinforcing fiber layer 4 and an outer nonwoven fabric layer 5 composed of a reinforcing layer with a monofilament diameter of 20mum or less and a basis wt. of 100-g/m or less.