Process for the manufacture of a composite material having aligned reinforcing fibers |
|||||||
| 申请号 | US71693868 | 申请日 | 1968-03-28 | 公开(公告)号 | US3617437A | 公开(公告)日 | 1971-11-02 |
| 申请人 | NAT RES DEV; | 发明人 | BAGG GREVILLE EUAN GORDON; DINGLE LESLIE ERNEST; JONES RONALD HAYDEN; PRYDE ALEXANDER WILLIAM HARROW; | ||||
| 摘要 | A process for the manufacture of a composite material comprising a matrix containing aligned reinforcing fibers includes the steps of dispersing the fibers in a viscous liquid, passing the dispersion through an orifice so that the fibers are at least partially aligned, and laying the dispersion containing aligned fibers upon a permeable surface moving relative to the orifice at a velocity at least that at which the fiber dispersion leaves the orifice and withdrawing the viscous liquid through the permeable surface by suction sufficiently rapidly for the alignment of the fibers thereon to be maintained. | ||||||
| 权利要求 | 2. A process according to claim 1 wherein the permeable surface is the circumferential surface of a drum rotating about a substantially horizontal axis. 3. A process according to claim 2 wherein said aligned fibers are continuously formed as a felt upon and removed as a felt from the circumferential surface of the drum. 4. A process according to claim 6 wherein the permeable surface is a horizontal bed. 5. A process according to claim 1 wherein said orifice is in the form of a slit extending above the permeable surface in a direction transverse to the direction of relative movement of the orifice and the aligning surface. 6. A process according to claim 5 wherein said slit width at exit is between about 0.030 and 0.080 inches. 7. A process according to claim 1 wherein said velocity of relative movement between the orifice and the permeable surface is greater then the velocity at which the dispersion flows from the orifice. 8. A process according to claim 1 wherein said orifice is reciprocated longitudinal to the direction of relative movement of the permeable surface and above the permeable surface so that a sufficient thickness of aligned fiber sheet is built up. 9. A process according to claim 8 wherein said permeable surface beneath the reciprocating orifice moves unidirectionally and continuously at a velocity sufficient for each reciprocation of the orifice to deposit a layer of aligned fibers which overlaps and said movement is staggered from the layer deposited by the preceding reciprocation thereby producing a continuous sheet of aligned fiber of a sufficient multilayer thickness. 10. A process according to claim 1 in which the viscous liquid is selected from the group consisting of glycerine, glycerol, Aqueous solutions thereof, and aqueous solutions of cellulose ethers. 11. A process according to claim 1 wherein the reinforcing fibers are selected from the group of ceramic materials consisting of carbon, silicon carbide, silicon nitride and asbestos. 12. A process according to claim 1 wherein said aligned fiber on the permeable surface is washed free of viscous liquid while maintaining the fiber alignment and subsequently dried to give a handleable sheet. |
||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈