Coated fiberglass?
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Coated fiberglass?
Hi all,
Some one known what kind of coating it is on fiberglass?
Looks that it is spread from one side, fiberglass feels more stiffer..
I found that coated fiberglass much better squeeze out bubbles from resin during press.
Pictures of coated fiberglass attached
Some one known what kind of coating it is on fiberglass?
Looks that it is spread from one side, fiberglass feels more stiffer..
I found that coated fiberglass much better squeeze out bubbles from resin during press.
Pictures of coated fiberglass attached
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It looks like a kind of pre-preg, the resin is applied to one side only to stabilise the weave, then when you heat and apply pressure from a press or autoclave, the resin reduces in viscosity and impregnates the fibres.
Either that or it's just a weave stabiliser, although as there are cross fibres in there it doesn't seem to me to be that
Either that or it's just a weave stabiliser, although as there are cross fibres in there it doesn't seem to me to be that
I don't think that this is what you are asking but it is interesting that all glass fibre is coated in the manufacturing process to stop the fibres from abrading each other and for the resin to stick effectively to the fibres.
The process of coating is called sizing and often products called silanes are used. This allows the fibres to be formed into rovings (bundles of individual fibres) and then into cloth or unidirectional fabrics.
There are some newer methods of sizing called direct sizing that is often used on aramid and carbon clothes because conventional sizing required temperatures that aramid and carbon don't tolerate in manufacturing.
Anyway just thought I would add it in as all glass is coated in the beginning but yours sounds like it is the fabric that has been coated. Possibly a binder has been applied to stabilise the weave? Or as others have said it is a form of pre-preg, but pre-preg fabrics usualy need to be kept refrigerated to stop the resin kicking.
Here is an article about glass fibre sizing (which has nothing to do with the size of the fibres it is just a name for the coating process!)
http://www.compositesworld.com/articles ... er-sizings
The process of coating is called sizing and often products called silanes are used. This allows the fibres to be formed into rovings (bundles of individual fibres) and then into cloth or unidirectional fabrics.
There are some newer methods of sizing called direct sizing that is often used on aramid and carbon clothes because conventional sizing required temperatures that aramid and carbon don't tolerate in manufacturing.
Anyway just thought I would add it in as all glass is coated in the beginning but yours sounds like it is the fabric that has been coated. Possibly a binder has been applied to stabilise the weave? Or as others have said it is a form of pre-preg, but pre-preg fabrics usualy need to be kept refrigerated to stop the resin kicking.
Here is an article about glass fibre sizing (which has nothing to do with the size of the fibres it is just a name for the coating process!)
http://www.compositesworld.com/articles ... er-sizings
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