Carbon Firbre Rolls (price Drop!)

[Chef_32]

Hello all.

I have some Carbon fibre i need to get rid of. Its preimpregnated

Its in rolls of 12inches (1 foot) by 333feet (100m). Fairly long rolls.

This is top quality.

I can reveal more material properties on request however, a comprehensive data sheet will be available upon purchase.

It can be used for anything from aesthetics to structural purposes.

Asking $500 neg per roll

Make that $400!!!!

call 0413 934 330

Located in Melbourne.

Carbon_Data.doc

Edited July 12, 2006 by Chef_32

[ed_ma61]

not interested in selling small cuts of say 10m lengths are you?

cheers

ed

[Chef_32]

not at the moment, but will eventually be selling smaller quantities once bulk is gone

[NateR31]

how hard is it lay side by side and keep the pattern matched?

any pics?

how thick is it?

Basicly is it just raw c/f roll, frayed edges ect..

[Chef_32]

pics added. i'm not too sure about how to lay it up. up til now we have been using wider rolls, and over lapping them. However, we do intend to build a formula style chassis from it.

thickness i can't say but its 190 grams per square metre. usually you overlap a few layers.

[NateR31]

im kinda a noob to this, but do you use a resien (sp) or anything to set and harden it when youve layed it down on somthing?

[topstage]

got data sheets? unidirectional don't have the pattern of conventional twill pattern. it's strands of carbon stiched together.

[Chef_32]

email sent to topstage....

I'll have to consult the people laying up the chassis, as i'm not involved in that aspect of development.

i do believe however, that we will generate a mould, add the carbon, vacuum seal it. pressurise it, and bake it.

At room temp, the prepreg is sticky, since it already has resin in it.

might be a good idea to go through forums such as these

http://www.racingcomposites.net

http://www.compositeforum.werksberg.com/

[NateR31]

How long will this be availible for? A guy at works knows all about carbon fibering, but would also like an information sheet about it to see if it would suit my/his aplications.

thanks

[ylwgtr2]

has it been stored in a freezer?If it has and hasnt gone off i may be interested

[Chef_32]

it is being stored in freezers yes.

I have attached a work document with as much data as i have available. Note: The specific item is T2G 190 Carbon Tape

Edited July 6, 2006 by Chef_32

[Chef_32]

Word document attached in original post.

[Chef_32]

Price drop $400 per roll

[Chef_32]

fine.... will take offers.

[satanic]

I don't know anything about carbon fibre but isn't there some world shortage at the moment, shouldn't this be snapped up by now?

[Chef_32]

you'd think so, but i guess no one really wants it around here

[NateR31]

ill buy some if you help me make some things lol.

[Chef_32]

i dunno if i can make anything yet.

I'll be trying, but i aint no expert...

[Beer Baron]

so am i right in saying this describes it:

Unidirectional Fabrics

A unidirectional (UD) fabric is one in which the majority of fibres run in one direction only. A small amount of fibre or other material may run in other directions with the main intention being to hold the primary fibres in position, although the other fibres may also offer some structural properties. Some weavers of 0/90° fabrics term a fabric with only 75% of its weight in one direction as a unidirectional, whilst for others the unidirectional designation only applies to those fabrics with more than 90% of the fibre weight in one direction. Unidirectionals usually have their primary fibres in the 0° direction (along the roll ­ a warp UD) but can also have them at 90° to the roll length (a weft UD).

True unidirectional fabrics offer the ability to place fibre in the component exactly where it is required, and in the optimum quantity (no more or less than required). As well as this, UD fibres are straight and uncrimped. This results in the highest possible fibre properties from a fabric in composite component construction. For mechanical properties, unidirectional fabrics can only be improved on by prepreg unidirectional tape, where there is no secondary material at all holding the unidirectional fibres in place. In these prepreg products only the resin system holds the fibres in place.

where as most comonly used for small panels, airboxes, dash panels etc is:

Woven Fabrics

For applications where more than one fibre orientation is required, a fabric combining 0° and 90° fibre orientations is useful.

Woven fabrics are produced by the interlacing of warp (0°) fibres and weft (90°) fibres in a regular pattern or weave style. The fabric's integrity is maintained by the mechanical interlocking of the fibres. Drape (the ability of a fabric to conform to a complex surface), surface smoothness and stability of a fabric are controlled primarily by the weave style. The following is a description of some of the more commonly found weave styles:

Plain

Each warp fibre passes alternately under and over each weft fibre. The fabric is symmetrical, with good stability and reasonable porosity. However, it is the most difficult of the weaves to drape, and the high level of fibre crimp imparts relatively low mechanical properties compared with the other weave styles. With large fibres (high tex) this weave style gives excessive crimp and therefore it tends not to be used for very heavy fabrics.

Twill

One or more warp fibres alternately weave over and under two or more weft fibres in a regular repeated manner. This produces the visual effect of a straight or broken diagonal 'rib' to the fabric. Superior wet out and drape is seen in the twill weave over the plain weave with only a small reduction in stability. With reduced crimp, the fabric also has a smoother surface and slightly higher mechanical properties.

Satin

Satin weaves are fundamentally twill weaves modified to produce fewer intersections of warp and weft. The ‘harness’ number used in the designation (typically 4, 5 and 8) is the total number of fibres crossed and passed under, before the fibre repeats the pattern. A ‘crowsfoot’ weave is a form of satin weave with a different stagger in the re-peat pattern. Satin weaves are very flat, have good wet out and a high degree of drape. The low crimp gives good mechanical properties. Satin weaves allow fibres to be woven in the closest proximity and can produce fabrics with a close ‘tight’ weave. However, the style’s low stability and asymmetry needs to be considered. The asymmetry causes one face of the fabric to have fibre running predominantly in the warp direction while the other face has fibres running predominantly in the weft direction. Care must be taken in assembling multiple layers of these fabrics to ensure that stresses are not built into the component through this asymmetric effect.

Basket

Basket weave is fundamentally the same as plain weave except that two or more warp fibres alternately interlace with two or more weft fibres. An arrangement of two warps crossing two wefts is designated 2x2 basket, but the arrangement of fibre need not be symmetrical. Therefore it is possible to have 8x2, 5x4, etc. Basket weave is flatter, and, through less crimp, stronger than a plain weave, but less stable. It must be used on heavy weight fabrics made with thick (high tex) fibres to avoid excessive crimping.

Leno

Leno weave improves the stability in ‘open’ fabrics which have a low fibre count. A form of plain weave in which adjacent warp fibres are twisted around consecutive weft fibres to form a spiral pair, effectively ‘locking’ each weft in place. Fabrics in leno weave are normally used in con-junction with other weave styles because if used alone their openness could not produce an effective composite component.

Mock Leno

A version of plain weave in which occasional warp fibres, at regular intervals but usually several fibres apart, deviate from the alternate under-over interlacing and instead interlace every two or more fibres. This happens with similar frequency in the weft direction, and the overall effect is a fabric with increased thickness, rougher surface, and additional porosity.

[Chef_32]

yeah, spot on. but this carbon tape is layed on a 0/90 degree format.