Group: Forum Members
Posts: 2.5K,
Visits: 28K
|
Polypropylene is excellent as it does have a good surface finish and is fairly easy to shape and work with, it does meet the criterias you are after. Securing it to MDF is also a good idea, so I think you've got it fairly sussed. You may just wish to fill the features of the polypropylene from the back with an expanding foam, just to ensure that the vacuum doesn't distort their shape slightly. They sound like rigid geometry, but you can never be too careful if you are trying to be accurate.
Polypropylene shouldn't need any release agent, but if it were me I would still apply a wax or chemical release agent, just because infusion is an aggressive process and while it isn't likely the resin will actually bond to the plastic, having a release agent can make demoulding just that much easier.
|