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

Nilikha ni

Charlie

28. Oktubre 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.
Abantado
3 days

Mga Tagubilin

1

Charge the tower with polystyrene

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

Mga materyales para sa hakbang na ito:

PolistirenaPolistirena300 libra

Mga kailangang kasangkapan:

Reactor na may presyonReactor na may presyon
Timbangang panimbangTimbangang panimbang
Gwantes na gomaGwantes na goma
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.

Mga materyales para sa hakbang na ito:

PropylenePropylene100 libra

Mga kailangang kasangkapan:

Tangke ng gas na may presyonTangke ng gas na may presyon
Reactor na may presyonReactor na may presyon
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
3

Stand two days at 40 °C

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

Mga kailangang kasangkapan:

Reactor na may presyonReactor na may presyon
Termometrong PanlaboratoryoTermometrong Panlaboratoryo
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.

Mga kailangang kasangkapan:

Reactor na may presyonReactor na may presyon
Termometrong PanlaboratoryoTermometrong Panlaboratoryo
Salamin Laban sa Tilamsik ng KemikalSalamin Laban sa Tilamsik ng Kemikal
Gwantes na gomaGwantes na goma
5

Saw into boards

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

Mga kailangang kasangkapan:

Lagaring pangkarpinteroLagaring pangkarpintero
Gwantes na gomaGwantes na goma

Mga Materyales

2
  • 1
    Polistirena
    300 libra
    Placeholder
  • 2
    Propylene
    100 libra
    Placeholder

Mga Kinakailangang Kasangkapan

7

Ang blueprint na ito ay gumagawa ng

Thumbnail
Placeholder

Tabla ng extruded polystyrene foam

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Kaugnay na Blueprint

Ang mga blueprint na ito ay nagbabahagi ng kaalaman — mga teknik, materyales, o prinsipyo

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

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

ni CharlieDE

Industriyal

11
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Ethylene by Steam Cracking of Naphtha

Ethylene by Steam Cracking of Naphtha

ni CharlieDE

Industriyal

12
0
0
0
0
0

CC0 Pampublikong Domain

Ang blueprint na ito ay inilabas sa ilalim ng CC0. Malaya kang kumopya, magbago, mamahagi, at gumamit nang walang pahintulot.

Suportahan ang Maker sa pamamagitan ng pagbili ng mga produkto sa kanilang Blueprint Komisyon ng Maker itinakda ng mga Vendor, o lumikha ng bagong bersyon ng Blueprint na ito at isama bilang koneksyon sa iyong Blueprint upang ibahagi ang kita.

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