Canadian Plastics

Prototypes can incorporate living hinge

To provide customers with prototypes that incorporate a living hinge, J.P. Pattern Inc. has perfected a technique for overmolding linen with polyurethane. The result is hinged prototype parts that off...

October 1, 2000   Canadian Plastics



To provide customers with prototypes that incorporate a living hinge, J.P. Pattern Inc. has perfected a technique for overmolding linen with polyurethane. The result is hinged prototype parts that offer production-like performance for physical and field testing.

To make a fabric/polyurethane preform, a piece of linen is inserted into a two-part acrylic mold, designed to produce a hinge with a thick centre section that tapers out to thin sidewalls. Then a resilient polyurethane, such as Ren RP 6402-1 R/H supplied by Vantico, is applied to the fabric and the mold is closed, squeezing resin into the cloth.

After the linen/polyurethane preform is removed from the mold, it is placed in a silicone rubber mold and polyurethane is dispensed into the tool cavity to produce the prototype part.

Vantico 517/351-5900


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