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E-glass Fibre Strand: Alkali-Free Lime-Alumina-Borosilicate Glass Drawn to Filament
Charlie

Dicipta oleh

Charlie

20. Oktober 2026DE
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E-glass Fibre Strand: Alkali-Free Lime-Alumina-Borosilicate Glass Drawn to Filament

Fibre from ordinary glass carries alkali on its huge surface; it takes up water from the air and slowly destroys itself, and it conducts electricity. Schoenlaub's Owens-Corning glass (US 2,334,961, 1943) has no alkali at all: lime, magnesia, alumina and silica fluxed with boric oxide. It was made to be drawn into fibres for insulation and textiles. It is melted at up to 1420 °C and drawn into continuous filaments on a fast spool. The picture: our diagram.
Lanjutan
2 days

Arahan

1

Weigh out the batch

The patent's example glass: lime (CaO) 17.5 %, magnesia (MgO) 4.5 %, alumina 14.0 %, silica 54.0 %, boric oxide 10.0 %. Ours: weigh those five oxides in those proportions and mix them. Keep within the patent's limits; small changes make this glass devitrify.

Bahan untuk langkah ini:

Kapur tohorKapur tohor17.5 parts
Magnesium oksidaMagnesium oksida4.5 parts
Serbuk alumina (aluminium oksida)Serbuk alumina (aluminium oksida)14 parts
Pasir KuarzaPasir Kuarza54 parts
Oksida borikOksida borik10 parts

Alatan diperlukan:

Neraca dua piringNeraca dua piring
Cermin mata keselamatanCermin mata keselamatan
2

Melt at no more than 1420 °C

Melt the batch in a glass tank furnace without going above 1420 °C; the patent's day tanks ran on a 24-hour cycle.

Alatan diperlukan:

Relau peleburan kacaRelau peleburan kaca
PirometerPirometer
Sarung Tangan Tahan HabaSarung Tangan Tahan Haba
Cermin mata keselamatanCermin mata keselamatan
3

Feed the platinum bushing

Draw from a platinum-rhodium bushing like Slayter and Thomas's, heated by an adjustable current. The drawing range of this glass is about 2000–2400 °F (1090–1320 °C). A blower below the nozzles sets each filament.

Alatan diperlukan:

Kotak Pemintal Platinum-RodiumKotak Pemintal Platinum-Rodium
Transformer PenurunTransformer Penurun
PirometerPirometer
Peniup anginPeniup angin
Sarung Tangan Tahan HabaSarung Tangan Tahan Haba
4

Wind on a fast spool

Gather the filaments into a strand and wind it on a spool running as fast as 6,000–10,000 ft per minute (30–50 m/s). Filaments come out about .0001–.0003 in (2.5–7.6 µm) thick. The strand can then be twisted and plied into yarn.

Alatan diperlukan:

Dram penggulungDram penggulung

Bahan

5

Alatan Diperlukan

9

Blueprint berkaitan

Blueprint ini berkongsi pengetahuan — teknik, bahan atau prinsip

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