Fuzzy-backed Polypropylene molds

I’m not entirely sure that we were supposed to post this stuff, but I figured I would throw up the example molding method that I researched for next Tuesday.  The method  was developed at the Centre of Architectural Structures and Technology at the University of Manitoba’s Faculty of Architecture.   It employs woven, high density, polyethylene or polypropylene fabrics manufactured with a smooth waterproof coating on one side, and a fuzzy non-woven fabric welded to the other side.

Molding Research

They are doing a couple different things with rectangular sheets of this material that I found interesting.  The first method they are using is frame structures that the fabric is suspended and put into tension over.  Plaster is then applied to the fuzzy side of the fabric which has been left facing up.  When hard, it creates a plaster mold coated in the polypropylene side of the fabric that they can then use to create as many of the same thin concrete structures as they want.

The second method involves the same process, but the fabric is then applied to the final product creating concrete structures with textile surfaces.

The third involves only tension.  The fabric is simply suspended over void space and put into tension at varied points to create interesting structure.  I also saw some instances where the fabric looked like it was plastered while hanging to create concrete curtain walls that actually resembled curtains.

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