Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Extruded Polystyrene Foam: Butylene-Blown Logs 20 Inches Across (McIntire, Dow 1948, Ex. 4)
Extruded polystyrene foam blown with a butylene gas fraction. 300 lb of polystyrene and about 130 lb of the fraction stand two days at 110 °C under 265 psi. Opened again and again, the tower let out foam logs 20 inches across and 20 feet long, weighing only 0.8 lb per cubic foot. Unknown: a source for the butylene fraction, linked to an unknown head.
Source: O. R. McIntire (Dow), US 2,450,436 (1948), Example 4. Picture: the patent's drawing.
Hejuru
3 days
Amabwiriza
1
1
Charge the tower with polystyrene
Charge the tower with polystyrene
Charge a high-pressure tower with 300 lb of granular polystyrene.
Ibikoresho by'iyi ntambwe:
Polisitirene300 lbsIbikoresho bikenewe:
Reyakitori y'igitutu
Umunzani w'ibiro
Uturindantoki tw'ikawusu2
2
Add the butylene fraction
Add the butylene fraction
Add about 130 lb of a cracked-oil gas fraction that is about 87 % normal butylenes, with some butanes and butadiene, under pressure. Unknown: a source for this fraction. Flammable gas: no flames, strong ventilation.
Ibikoresho by'iyi ntambwe:
Igice cya gaze yo gusatura gikize kuri butilene130 lbsIbikoresho bikenewe:
Ibariro rya gazi ifite igitutuReyakitori y'igitutu
Amadarubindi yo Kwirinda Ibinyabutabire3
3
Heat two days at 110 °C
Heat two days at 110 °C
Close the tower and heat it at 110 °C for two days. The gauge pressure stays at 265 psi.
Ibikoresho bikenewe:
Reyakitori y'igitutu
Igipima Ubushyuhe cy'Ubushakashatsi4
4
Let out logs through a 3.25 inch outlet
Let out logs through a 3.25 inch outlet
Open and close the 3.25 inch outlet near the bottom again and again. Each portion swells into a foam log 20 inches across and about 20 feet long, with fine, even, closed cells, weighing 0.8 lb per cubic foot.
Ibikoresho bikenewe:
Reyakitori y'igitutuAmadarubindi yo Kwirinda IbinyabutabireUturindantoki tw'ikawusu5
5
Saw into boards
Saw into boards
When the foam has set, saw it lengthwise into slabs (ours: a woodworking saw).
Ibikoresho bikenewe:
Umusumeno w'ababajiUturindantoki tw'ikawusuIbikoresho
2- 300 lbsUmwanya
- Umwanya
Ibikoresho bikenewe
7- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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