Hello,
my name is Dominik Dierkes an I am the owner of DD-Compound. We made the infusion in the video with the MTI Tube.
We use the PVA because with other mould release agents we had problems in combination with the PU In Mould Coating.
Normaly we spray the PVA so that the surface better, but in the video we did not do that because not all people have the possibility to spray the PVA.
We showed the demoulding without a cut so that you see that the surface is not finished afterwards. In the most videos the part is not directly shown after demoulding. Thats why I used the screw driver, it was the only thing that was next to me I can use without loosing to much time.
The good surface is also a result of using the MTI Tube, because it is air permeable and resin inpermeable. If thepart is completely impregnated the resin can not get out of the mould so that the full ambient pressure works on the part. That why there are no airbubbles or pinholes in the part. You also does not need a resin trap and you can choose a free resin flow because the resin has to go through the hole part. The resin can not get into the MTI hose.
We made Test with spray adhesives. If you do not use too much and take an adhesive that stays on the fibre it does not really matter.
The peel ply can be removed so easy because of the good fibre to volume ratio. We normaly have a fibre to volume ratio between 55 and 60%.
If you have any questions please ask. If you are interested in the MTI hose we can send you a sample.
Kind regards
Dominik