Ukusebenzisana
UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
Extruded Polystyrene Foam: Propylene-Blown Log Let Out at 60 °C (McIntire, Dow 1948, Ex. 3, Test 3)
Charlie

Yenziwe ngu-

Charlie

28. uMfumfu 2026DE
11
0
0
0
0

Extruded Polystyrene Foam: Propylene-Blown Log Let Out at 60 °C (McIntire, Dow 1948, Ex. 3, Test 3)

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 60 °C (300 psi in the tower), it swelled into a log 11 inches across, weighing 3.08 lb per cubic foot, with small uniform cells. Source: O. R. McIntire (Dow), US 2,450,436 (1948), Example 3. Picture: the patent's drawing.
Osezingeni eliphezulu
3 days

Imiyalelo

1

Charge the tower with polystyrene

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

Izinto zokwakha zalesi sinyathelo:

I-PolystyreneI-Polystyrene300 lbs

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
Isikali sesilinganisoIsikali sesilinganiso
Amagilavu erabhaAmagilavu erabha
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.

Izinto zokwakha zalesi sinyathelo:

I-propyleneI-propylene100 lbs

Amathuluzi adingekayo:

Isilinda segesi ecindezelweIsilinda segesi ecindezelwe
I-reactor yengcindeziI-reactor yengcindezi
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
3

Stand two days at 40 °C

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

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
Ithemomitha YaselabhorethriIthemomitha Yaselabhorethri
4

Let it out at 60 °C

Open the valved outlet near the bottom (2.5 inch in the patent) at 60 °C. The pressure is about 300 psi. The gel flows out and swells into a log 11 inches across, 3.08 lb per cubic foot, with small 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.

Amathuluzi adingekayo:

I-reactor yengcindeziI-reactor yengcindezi
Ithemomitha YaselabhorethriIthemomitha Yaselabhorethri
Izibuko Zokuchitheka KwamakhemikhaliIzibuko Zokuchitheka Kwamakhemikhali
Amagilavu erabhaAmagilavu erabha
5

Saw into boards

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

Amathuluzi adingekayo:

Isaha lombaziIsaha lombazi
Amagilavu erabhaAmagilavu erabha

Izinto

2

Amathuluzi Adingekayo

7

Le blueprint yenza

Thumbnail
Isibambeli

Ibhodi legwebu le-polystyrene elicindezelwe

Free

112
0
1

Ama-blueprint ahlobene

Lama-blueprint abelana ngolwazi — amasu, izinto noma izimiso

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

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

ngu-CharlieDE

Kwezimboni

11
0
0
0
0
0
Ethylene by Steam Cracking of Naphtha

Ethylene by Steam Cracking of Naphtha

ngu-CharlieDE

Kwezimboni

12
0
0
0
0
0

CC0 Isizinda Somphakathi

Le blueprint ikhishwe ngaphansi kwe-CC0. Ukhululekile ukukopisha, ukuguqula, ukusabalalisa, nokusebenzisa ngaphandle kwemvume.

Sekela uMenzi ngokuthenga imikhiqizo nge-Blueprint yabo IKhomishane Yomenzi kumiswe ngabathengisi, noma dala inguqulo entsha yale Blueprint bese uyifaka njengoxhumaniso ku-Blueprint yakho ukuze wabelane ngemali engenayo.

Ingxoxo

(0)

Ngena ukuze ujoyine ingxoxo

Kulayishwa amazwana...