Materials-Design Trade-offs

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Design Trade-offs

The weight and cost are primarily dependant upon the type of plastic used for the pad’s body and the approximate average thickness of the body. Possible materials and approximate corresponding figures are shown below.

Thickness I	1/8”
Thickness II	2/8”
Thickness III	3/8”

Average low-volume market prices per pound (on 1/10/2005) used for resins. Resins assumed to be prime, unfilled, injection-mold variety.

Material / Thickness		Thickness I	Thickness II	Thickness III
ABS Plastic	Cost	25.22	37.83	50.44
ABS Plastic	Weight	26	39	52
ABS / Nylon Blend	Cost	48.16	72.24	96.32
ABS / Nylon Blend	Weight	28	42	56
Nylon 6	Cost	45.9	68.85	91.8
Nylon 6	Weight	30	45	60
Recycled ABS	Cost	6.24	9.36	12.48
Recycled ABS	Weight	26	39	52
				Cost (US Dollars)
				Weight (Lbs.)