초록 ▼

A carbonaceous preform, which is free from such drawbacks as delamination and is superior in formability and mass productivity, can be obtained by a process comprising the steps of fixing a laminate of stacked carbon fibers with a fixing jig in the absence of a binder, impregnating the thus-fixed la

A carbonaceous preform, which is free from such drawbacks as delamination and is superior in formability and mass productivity, can be obtained by a process comprising the steps of fixing a laminate of stacked carbon fibers with a fixing jig in the absence of a binder, impregnating the thus-fixed laminate with a molten carbonaceous pitch, and carbonizing the impregnated laminate in a non-oxidative gas atmosphere.

대표청구항 ▼

[ What is claimed is:] [1.] A process for producing a carbonaceous preform, comprising the steps offixing a laminate of stacked carbon fibers with a fixing jig in the absence of a binder, the fixing jig comprising two plates and a fixing means, wherein the two plates are spaced at a pre-determined d

[ What is claimed is:] [1.] A process for producing a carbonaceous preform, comprising the steps offixing a laminate of stacked carbon fibers with a fixing jig in the absence of a binder, the fixing jig comprising two plates and a fixing means, wherein the two plates are spaced at a pre-determined distance apart, and wherein the space between the two plates can be adjusted to obtain a desired volume content of the carbon fibers;impregnating the thus-fixed laminate with a molten carbonaceous pitch; andcarbonizing the impregnated laminate at a heating rate of 1.degree. C./hour-1,000 .degree. C./ minute and at a normal pressure or by isotactic pressing, under a non-oxidative gas atmosphere, wherein the plates are maintained at the pre-determined distance during the impregnating and carbonizing steps.