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Extruded Polystyrene Foam: Propylene-Blown Log Let Out at 50 °C (McIntire, Dow 1948, Ex. 3, Test 2)
Charlie

Imeundwa na

Charlie

28. Oktoba 2026DE
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Extruded Polystyrene Foam: Propylene-Blown Log Let Out at 50 °C (McIntire, Dow 1948, Ex. 3, Test 2)

Extruded polystyrene foam blown with a propylene gas fraction instead of methyl chloride. Polystyrene stands two days at 40 °C with the propylene under pressure and becomes a gel. Let out at 50 °C (250 psi in the tower), it swelled into a log 6 to 9 inches across, weighing 4.8 lb per cubic foot, with somewhat smaller, uniform cells. Source: O. R. McIntire (Dow), US 2,450,436 (1948), Example 3. Picture: the patent's drawing.
Juu
3 days

Maagizo

1

Charge the tower with polystyrene

Charge a high-pressure tower with 300 lb of granular polystyrene.

Vifaa kwa hatua hii:

PolistiriniPolistirini300 paundi

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Mizani ya mizani-mbiliMizani ya mizani-mbili
Glavu za mpiraGlavu za mpira
2

Add the propylene fraction

Add 100 lb of a cracked-oil gas fraction that is about 93 % propylene, under pressure, and close the tower. Propylene is a flammable gas: no flames, strong ventilation.

Vifaa kwa hatua hii:

PropiliniPropilini100 paundi

Zana zinazohitajika:

Mtungi wa gesi yenye shinikizoMtungi wa gesi yenye shinikizo
Riakta ya shinikizoRiakta ya shinikizo
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
3

Stand two days at 40 °C

Let the tower stand for two days at 40 °C while the polystyrene takes up the propylene.

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Kipimajoto cha maabaraKipimajoto cha maabara
4

Let it out at 50 °C

Open the valved outlet near the bottom (3.25 inch in the patent) at 50 °C. The pressure is about 250 psi. The gel flows out and swells into a log 6 to 9 inches across, 4.8 lb per cubic foot, with somewhat smaller, uniform cells. Close the outlet again. The patent heated step by step (50, 60, 75 °C) for several hours each, letting a portion out at each step.

Zana zinazohitajika:

Riakta ya shinikizoRiakta ya shinikizo
Kipimajoto cha maabaraKipimajoto cha maabara
Miwani ya kinga dhidi ya kemikaliMiwani ya kinga dhidi ya kemikali
Glavu za mpiraGlavu za mpira
5

Saw into boards

When the foam has set, saw it lengthwise into slabs (ours: a woodworking saw).

Zana zinazohitajika:

Msumeno wa useremalaMsumeno wa useremala
Glavu za mpiraGlavu za mpira

Vifaa

2
  • 1
    Polistirini
    300 paundi
    Kishikilia Nafasi
  • 2
    Propilini
    100 paundi
    Kishikilia Nafasi

Zana Zinazohitajika

7

Mchoro huu unatengeneza

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Kishikilia nafasi

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Extruded Polystyrene Foam Board: Polystyrene Swollen with Methyl Chloride and Let Out below 130 °C
Hatari

Extruded Polystyrene Foam Board: Polystyrene Swollen with Methyl Chloride and Let Out below 130 °C

na CharlieDE

Viwandani

8
0
0
0
0
0
Ethylene by Steam Cracking of Naphtha

Ethylene by Steam Cracking of Naphtha

na CharlieDE

Viwandani

10
0
0
0
0
0

CC0 Umma Wote

Mchoro huu umetolewa chini ya CC0. Uko huru kunakili, kubadilisha, kusambaza, na kutumia kazi hii kwa madhumuni yoyote, bila kuomba ruhusa.

Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.

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