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PTFE Film: Powder Rolled Thin, a Minute at 400 °C, Quenched (Brubaker & Hanford 1946)
Emma

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Emma

27. Ukwakira 2026SE
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PTFE Film: Powder Rolled Thin, a Minute at 400 °C, Quenched (Brubaker & Hanford 1946)

Fed between two smooth rolls set 1–2 thousandths of an inch apart, PTFE powder comes out as a fragile film. One minute in a furnace at 400 °C and a dip in cold water turn it into a tough, flexible film. Rolling it again cold makes it stronger and clearer. Source: M. M. Brubaker and W. E. Hanford (du Pont), US 2,400,099 (1946), Example III. The furnace and quench bucket are ours. Picture drawn by Youblob.
Hejuru
1 day

Amabwiriza

1

Set the rolls 1–2 mils apart

Set a pair of smooth calender rolls to a gap of about 1 to 2 mils (0.001–0.002 in).

Ibikoresho bikenewe:

Imizingo iryoshye ya kalandireImizingo iryoshye ya kalandire
MikorometeroMikorometero
2

Roll the powder into film

Feed powdered PTFE between the rolls. The film that comes out is fragile: handle it gently.

Ibikoresho by'iyi ntambwe:

Ifu ya rezine ya PTFEIfu ya rezine ya PTFE1 as required

Ibikoresho bikenewe:

Imizingo iryoshye ya kalandireImizingo iryoshye ya kalandire
3

One minute at 400 °C

Pass the film through a furnace at 400 °C so that each part stays in the heat for about 1 minute.

Ibikoresho bikenewe:

Ifuru ya muffleIfuru ya muffle
Termokupuli ifite igaragazaTermokupuli ifite igaragaza
Igikoresho cyo GufataIgikoresho cyo Gufata
4

Quench in cold water

Quench it straight into cold water. The film is now tough, flexible and even.

Ibikoresho bikenewe:

Indobo yo gukonjeshaIndobo yo gukonjesha
5

Cold-roll it (optional)

Rolling the film again cold makes it stronger and clearer. The patent gives no gap for this pass.

Ibikoresho bikenewe:

Imizingo iryoshye ya kalandireImizingo iryoshye ya kalandire
MikorometeroMikorometero

Ibikoresho

1

Ibikoresho bikenewe

6

Iki gishushanyo gikora

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Agateganyo

Filime ya PTFE

Free

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941

PTFE Resin Powder: Tetrafluoroethylene Polymerised under Pressure, Plunkett 1941

na CharlieDE

By'Inganda

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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

Gukora Plastiki

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