Which resin should I use?

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#1

Hi Everyone, I’m new to resin infusion so for my first infusion project I’m making a 12" x 36" 4 layer laminate using 9oz bidirectional glass cloth as the reinforcent. The laminate will be cut into smaller sections, each section will be used to create a 1" wide rectangular flange that will overlap several 5x7 square access holes (1/2" either side of the cut line) that I’ve cut in the wing of an experimental aircraft I own - the holes were necessary to access the fuel bays for some modifications. The aircraft was constructed primarily using Derkane 411-45 resin (later 411-R I think) so my question is two fold: (1) Do all vinylester resins bond well to other vinylester resins? (2) What brand or part number vinylester infusion resin would you recommend I use to create the above mentioned pre-cured laminates? The resin selection MUST be compatible with Derkane 411-45 in so far as the secondary bond using said 411-45 (bonding the flange to the inside skin of the wing and then later bonding the inside skin of the square cut-out to the flange) must be strong. Any advice you can provide would be much appreciated!

J

#2

Oh… as for sequence… I plan to use a flat piece of glass, lay the 4 layers of 9oz cloth down, then a layer of peel ply (I’m not 100% sure what type of peel ply I should use… perforated peel ply with our without release agent … plain peel ply with or without release agent), then a layer of release film, then a layer of green flow media, then maybe a layer of breather fabric, then the bag. So far I just have the 5CFM vac pump but still have need to buy the other supplies (vac tubing… 1/4" ID or 3/8
ID???, spiral wrap, tee fittings, resin trap, etc)…

#3

All peel ply release’s,it is used for secondary bonding,I use red stripe.

#4

If you want to stick with Derakane Vinylester, choose the 411-100 resin. This one is optimised for infusion.

Alternatively you could laminate with epoxy. Epoxy has a very good bond with vinylesters, but you might need to postcure (using a hot-bonder, heat blanket or lamps)

Peelply is not perforated, it is the release film that is.

Choose a peelply without release agent. Any will do. There is a difference in texture, but nothing to worry about.
Choose a release film with as much perforation as possible. Most are self releasing (PE or PP based) so again no release needed. Perforation style P, P1 or MP22 (Airtech). The latter is highly recommended.
As an alternative there is a material from www.fibertex.dk, called Compoflex, which is very, very suitable. Available in various styles. (with or without infusion mesh or bleeder, and in smooth or peelply surface)