resin infusion problem


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santana-dk
santana-dk
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Hello 

 As the title says I have had some problems infusing flat carbon/aramid sheets.  I am using glass as a mould so i can get as smooth sheet as possible.
 I use EC mould clean > followed by Easy Lease x4 times. the sheet is 32cm X 26 cm and 160ml of resin was used.
 After 1 hour or so i Lay:
- 1 Layer of 300gr Plain weave Carbon 
- 3 Layers Of Kevlar 280 gr 
- 1 Layer of the same Carbon. 
 -Peel Ply
-P3 Release film Perforated
-  Infusion Mesh
- Resin infusion spiral
- Bagging film

http://www.talkcomposites.com/Uploads/Images/7650b625-982e-4a80-bbc5-e412.jpg



 Since i didn't have more resin infusion resin I used EL2 Epoxy Laminating Resin that i let it be heated by the sun for 1 hour. I could clearly see the the viscosity of the resin had changed. i  For the Mix Ration I then used with 2/3 of  AT30 Epoxy Hardener FAST in conjunction of the Slow hardener since i didn't know hoe fast the infusion process would take ( The  infusion process took under 25 secs BTW).
 The bag didn't had any leaks since i let it be for 1 hour.

Room temperature was close to 30 degrees and it never dropped to under 25 during Gelation time.
i demolded the sheet after 17 hours.
http://www.talkcomposites.com/Uploads/Images/d57b5132-f1d4-45ab-9547-7c04.jpg http://www.talkcomposites.com/Uploads/Images/00567227-5b94-4408-9467-b53f.jpg

 So where in the process  did I go wrong ? 
did I pull a too hard vacuum;  should have used a Lossless vacuum regulator ?
or should i just leave it a full day or more before demoulding ?`
Any tip will be appreciated.

Santana
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