公开(公告)号：US3620897A

公开(公告)日：1971-11-16

申请号：US3620897D

申请日：1969-07-02

Applicant: KURASHIKI RAYON CO

Inventor： TANIMOTO KATSUKIYO ,  URAKAMI TAMIO ,  ITADANI SOTARO

IPC: B29D29/00 ,  B29D29/06 ,  B65G15/34 ,  B32B25/10

CPC classification number: B29D29/06 ,  B29D29/00 ,  B65G15/34 ,  B65G2201/06 ,  Y10T428/2905 ,  Y10T442/636 ,  Y10T442/679 ,  Y10T442/682

Abstract: A conveyor belt consisting of a core body and rubber covers interposing said core, the core body being formed of a nonwoven sheet of staple fiber webs, the fibers constituting the nonwoven sheet being mutually entangled by needling and at least approximately 80 percent thereof being oriented in longitudinal direction of the belt by drawing of the nonwoven sheet in longitudinal direction, and the nonwoven sheet being sufficiently impregnated with an adhesive. Such conveyor belt is prepared by a process which comprises needling a web of 200-1,000 g./m.2 formed of crimped and 40-120 mm. long staple fibers at a needling density of 50-250 times/cm.2; drawing the needled web in its longitudinal direction by at least 50 percent; impregnating the nonwoven sheet with an adhesive to produce a core body; and pressing rubber covers onto the top and bottom surfaces of such core body. The impregnation of the needled web with the adhesive may be conducted prior to drawing.