| 摘要 |
PURPOSE:To obtain a laminate having improved adhesiveness to cloth, improved mechanical strength and dimensional stability, by treating aromatic polyamide fiber cloths by plasma at low temperature, impregnating them with a polyimide adhesive, and subjecting plural sheets of the prepreg to contact bonding under heating. CONSTITUTION:Aromatic polyamide fiber cloths are treated by low-temperature plasma at 0.05-20 Torr gas pressure, impregnated with a polyimide, adhesive, dried, prepared plural sheets of prepreg are piled, and subjected to contact bonding under heating. The low-temperature plasma treatment is carried out by using a mixed gas of oxygen/nitrogen =95/5-5/95 (volume ratio). Preferably the cloths subjected to the low-temperature plasma treatment undergo surface treatment with a coupling agent containing an amino group or epoxy group. The amount of the polyimide adhesive used is 50-250pts.wt. based on 100pts.wt. cloth. |
