Friday, November 16, 2007

Filled glue/paint/adhesive part1

The mix contains 12.3g polyols, 4.7g 4,4'-diphenylmethanediisocyanate = 17g of the polyurethane casting compound. Added 25.4g SiC powder, 6-micron, unknown purity, pleasant gray color. That makes it 60% by weight of the SiC. Hardly mixable.

Adhesion testing: polystyrene, aluminium, polyethylene, wood, foam polystyrene glass epoxy PCB, zin-coated steel, complete hardening expected to be two days.

Monday, November 12, 2007

English to metric conversions !!!

Follow this link or read below, amazing work guys!

English Unit

Quantity

Multiply by

Metric Unit

inch

1

25.4

mm

foot

1

0.3048

m

in2

1

645.16

mm2

ft2

1

0.09290304

m2

ft3/min

1

0.0004719

m3/s

BTU/hr

1

0.2930711

W

BTU/hr-ft-F

1

1.729577

W/m-K

BTU/hr-ft2

1

3.1546

W/m2

BTU/hr-ft2-F

1

5.67826

W/m2-K

BTU-in/hr-ft2-F

1

0.144228

W/m-K

F-ft2-hr/BTU-in

1

6.9333466

m-K/W

F-ft2-hr/BTU

1

0.176109

m2-K/W

lbf/ft3

1

16.01846

kg/m3

lbf/ft2

1

47.88026

Pa

mph

1

0.44704

m/s