公开(公告)号：JPH02231111A

公开(公告)日：1990-09-13

申请号：JP27364789

申请日：1989-10-20

Applicant: STAMICARBON

Inventor： RUISU KORUNERISU KURIJIYAA ,  YOZEFU MARIA ANTONIUSU YANSEN ,  NIKORAASU GERARUDO MARII HOEN ,  ROORENTEIUSU UIRUHERUMUSU SUTE ,  PIITAA ERUNSUTO FUROERINGU

IPC: B29B9/14 ,  B29C70/88 ,  B29K105/12 ,  C08K7/06 ,  C08L101/00 ,  H01B1/22

Abstract: PURPOSE: To enhance the barrier properties of an obtained molding compd. by constituting a granulated material of granules in which a specific amt. of electrically conductive fiber bundles are incorporated in a specific dispersing degree. CONSTITUTION: A plastic granulated material comprises granules in which 0.3-4 vol.% electrically conductive fiber bundles are incorporated in a dispersing degree of 0.10 or less. The dispersing degree is a reciprocal value of the vol. ratio (%) of granules occupied by electrically conductive fiber bundles containing 60-20,000 fibers and measured by a threshold value method. The selected threshold value is determined by the amt. of fibers present per a surface area of 1 mm and must be a value such that the area covered with fibers cut in a value cross section is at least 5% of the whole of the surface. The fibers have a length of 4-8 mm for example and impregnated with a resin. The plastic material is usually a thermoplastic polymer compsn. When this plastic granulated material is used, the clogging of an extruder is avoided and, in spite of a low dispersing degree, that is, the slight distribution of fibers in granules, this material is suitable for forming a molding compd. having excellent barrier properties by processing.