Method for producing a flat semi-finished product from a fiber composite material and flat semi-finished product

Inactive Publication Date: 2013-08-15
SGL AUTOMOTIVE CARBON FIBERS
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  • Description
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  • Application Information

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Benefits of technology

[0013]The object of the present invention is to make available a method for producing a flat semi-finished product of fiber-reinforced composite material of the type defined in the introduction in which carbon fibers that are available inexpensively can be used as the rei

Problems solved by technology

Carbon fibers are difficult to process by traditional carding techniques and in particular are difficult to

Method used

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  • Method for producing a flat semi-finished product from a fiber composite material and flat semi-finished product
  • Method for producing a flat semi-finished product from a fiber composite material and flat semi-finished product
  • Method for producing a flat semi-finished product from a fiber composite material and flat semi-finished product

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Example

[0067]Referring now to the single FIGURE of the drawing in detail, there is shown at least one fiber layer 14 (at the left in the drawing) being fed into the carding system, passing initially over feed rollers 1, 2 onto a licker-in 3 rotating in the opposite direction from the intake rollers. A transfer roller 4 rotating in a direction opposite that of the licker-in 3 and the main drum 5 is arranged between the licker-in 3 and the main drum 5 (tambour) rotating in the same direction of rotation as the licker-in 3. Various workers 6 and turners 7 are arranged on the circumference of the main drum 5 in various circumferential positions. The object of these devices is to shred the incoming fiber layer 14 in the carding system down to individual fibers and then shape them back into a thin fiber web having a uniform weight and a defined weight per unit of area. A longitudinal fiber orientation is preferably the goal here.

[0068]Downstream from the main drum 5, a takeoff drum 10 rotating i...

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Abstract

A method produces a flat semi-finished product from a fiber composite material that contains individual carbon fibers, carbon fiber bundles, or a mixture thereof in a defined anisotropic fiber orientation and a thermoplastic matrix material. The anisotropy of the carbon fibers is created in a carding process using the high orientability of admixed non-carbon textile fibers, at least some of the non-carbon textile fibers being thermoplastic, and the carbon fibers having been isolated from waste or used parts. The flat fibrous web which is produced by a carding process and which has a specific orientation of the carbon fibers in the longitudinal direction is compressed into a sheet material under the effect of heat. This enables the use of carbon fibers, for example from production waste, as reinforcing fibers, whereby a less expensive raw material is provided and the carbon fibers are contained in the waste materials are recycled.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a continuation, under 35 U.S.C. §120, of copending international application No. PCT / EP2011 / 000486, filed Feb. 3, 2011, which designated the United States; this application also claims the priority, under 35 U.S.C. §119, of German patent application No. DE 10 2010 008 370.4, filed Feb. 17, 2010; the prior applications are herewith incorporated by reference in their entirety.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a method for producing a flat semifinished product from a fiber composite material containing fibers and at least one thermoplastic matrix material, wherein fibers are isolated from wastes or used parts containing fibers, then the fibers are blended with thermoplastic fibers and laid out in a sheet in a carding operation, thus producing a fiber web, which is pressed under the influence of heat to form a sheet material in at least one subsequent step.[0003]Carbon f...

Claims

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Application Information

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IPC IPC(8): D01G15/00D04H3/002D04H3/015D04H3/02D04H3/004
CPCB29B11/16B29K2101/12B29K2707/04D04H3/02D04H3/002D04H3/004D04H3/015D01G15/00Y10T442/10Y10T442/3715Y10T442/644Y10T442/645B29B17/00D04H3/12
Inventor ORTLEPP, GERALDLUETZKENDORF, RENATEREUSSMANN, THOMAS
Owner SGL AUTOMOTIVE CARBON FIBERS
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