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PTFE Rod: a Plug Sintered in Boiling Retene Vapour (Brubaker & Hanford 1946)
Emma

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Emma

27. Oktoba 2026SE
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PTFE Rod: a Plug Sintered in Boiling Retene Vapour (Brubaker & Hanford 1946)

The first example of du Pont's way to shape PTFE: press a small rod of powder cold, then heat it above 327 °C out of the mould. Here the heat comes from the vapour of boiling retene, which boils at 394 °C, so the temperature holds steady by itself. The plug comes out sintered into one tough piece. Source: M. M. Brubaker and W. E. Hanford (du Pont), US 2,400,099 (1946), Example I. The pressure is the patent's usual range, as the example gives none. The mould, press and the vapour-bath set-up are ours. Picture drawn by Youblob.
Juu
1 day

Maagizo

1

Press a plug from the powder

At room temperature, press small particles of PTFE in a mould into a plug 0.5 in across and 0.7 in long. The example gives no pressure; the patent's usual range is 100–3000 lb/sq in.

Vifaa kwa hatua hii:

Unga wa resini ya PTFEUnga wa resini ya PTFE1 as required for the plug

Zana zinazohitajika:

Kalibu ya kubanaKalibu ya kubana
Mashine ya kubana ya haidrolikiMashine ya kubana ya haidroliki
RulaRula
2

Set up a retene vapour bath

Boil retene so its vapour fills the space round a glass tube. Ours: retene in a flask on a burner, a reflux condenser on top, and the tube standing in the vapour.

Zana zinazohitajika:

ReteneRetene
Chupa ya Kioo ya KunerekaChupa ya Kioo ya Kunereka
Kikondensa cha KurudishaKikondensa cha Kurudisha
Kichomeo cha BunsenKichomeo cha Bunsen
Mirija ya majaribioMirija ya majaribio
3

Sinter for 3 hours

Take the plug out of the mould, put it in the glass tube, and heat it in the vapour of boiling retene (394 °C) for 3 hours.

Zana zinazohitajika:

Mirija ya majaribioMirija ya majaribio
ReteneRetene
Kichomeo cha BunsenKichomeo cha Bunsen
4

Cool it under the retene

Remove the heat source and let the plug cool where it is. It is now sintered together into a tough mass.

Zana zinazohitajika:

Mirija ya majaribioMirija ya majaribio

Vifaa

1

Zana Zinazohitajika

8

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Ufito wa PTFE

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941

PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941

na CharlieDE

Viwandani

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PTFE Ring: Pressed Cold, Sintered Out of the Mould (Brubaker & Hanford 1946)

PTFE Ring: Pressed Cold, Sintered Out of the Mould (Brubaker & Hanford 1946)

na EmmaSE

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