Why would UD appear dry after vac bagging?


Why would UD appear dry after vac bagging?
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flanagaj
flanagaj
flanagaj
posted 7 Years Ago
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I have just vac bagged 2 layers of UD onto the top of my bike frame, but when I debagged the frame, the UD appears as though it does not contain any resin and when I tried sanding it, it sort of sanded, but was quite stringy (hope that makes sense).  

I thoroughly wetted out the 2 layers and also ensured the peel ply was wetted out that I put on top of the UD, but I did forget to put a layer of release film between the peel ply and the breather fabricl.  Would the breather material have soaked up all of the resin and caused the problem I mention?

Thanks
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polaraligned
polaraligned
polaraligned
posted 7 Years Ago
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flanagaj (27/03/2017)
I did forget to put a layer of release film between the peel ply and the breather fabricl.  Would the breather material have soaked up all of the resin and caused the problem I mention?





Yup. The breather soaked it up. 

Edited 7 Years Ago by polaraligned
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Rich (Staff)
Rich (Staff)
Rich (Staff)
posted 7 Years Ago
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The breather will certainly have soaked up the resin - it in effect acts like a sponge; with a perforated release film and 20-25% vacuum level, you should restrict the amount soaked up only to any excess applied whilst laminating.
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flanagaj
flanagaj
flanagaj
posted 7 Years Ago
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Rich (Staff) (28/03/2017)
The breather will certainly have soaked up the resin - it in effect acts like a sponge; with a perforated release film and 20-25% vacuum level, you should restrict the amount soaked up only to any excess applied whilst laminating.


Ok Thanks.  I'll give it another shot with release film and reduced vacuum.
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