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Acrylic Block: Methyl Methacrylate Syrup Cast in Layers between Glass
Charlie

Yaremwe na

Charlie

20. Ukwakira 2026DE
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Acrylic Block: Methyl Methacrylate Syrup Cast in Layers between Glass

A thick acrylic block cannot be cast flawless in one pour. Tattersall (ICI, US 2,071,907, 1937) built it up in layers: pour 1/2 inch of syrup on a level glass plate, let it set for a day at room temperature, pour the next 1/2 inch on top, cover with a second glass plate, wait another day, then heat the sandwich at 80 °C. Each 1/2 inch layer shrinks to about 1/3 inch. The glass gives both faces a finished polish with no grinding. The picture: our diagram.
Hagati
3 days

Amabwiriza

1

Level the bottom plate

Set a glass plate on a ledge in a wooden frame, on a body of plaster of Paris, and level it carefully. The example sheet was 10 by 18 inches.

Ibikoresho bikenewe:

Ikirahure cy'idirishyaIkirahure cy'idirishya
Ikadiri y'ibitiIkadiri y'ibiti
Ipuratsi ya ParisIpuratsi ya Paris
Igipimo cy'urwegoIgipimo cy'urwego
2

Pour the first 1/2 inch

Pour room-temperature syrup 1/2 inch deep (about 1.5 litres for 10 by 18 inches; our figure). Cover against dust, but do not put the top plate on yet. Leave 24 hours at about 20 °C.

Ibikoresho by'iyi ntambwe:

Isirope ya metili metakirilateIsirope ya metili metakirilate3 l

Ibikoresho bikenewe:

Uturindantoki tw'ikawusuUturindantoki tw'ikawusu
Igipima Ubushyuhe cy'UbushakashatsiIgipima Ubushyuhe cy'Ubushakashatsi
3

Pour the next layer and cover

Pour a second 1/2 inch layer on the first. Lower the top glass plate onto it so it rests on the syrup and keeps pressing on it. Leave another 24 hours at about 20 °C. For a thicker block repeat the layers, a day apart, and put the plate on the last one.

Ibikoresho bikenewe:

Ikirahure cy'idirishyaIkirahure cy'idirishya
4

Heat at 80 °C

Take the glass sandwich out of the frame and heat it for three hours at 80 °C to finish the polymerisation.

Ibikoresho bikenewe:

Ifuru yo kumishahoIfuru yo kumishaho
Igipima Ubushyuhe cy'UbushakashatsiIgipima Ubushyuhe cy'Ubushakashatsi
Uturindantoki twihanganira ubushyuheUturindantoki twihanganira ubushyuhe
5

Spring off the glass

Spring the glass plates off the block with a knife blade. Both faces come out smooth and polished.

Ibikoresho bikenewe:

Icyuma cy'UbukorikoriIcyuma cy'Ubukorikori
Uturindantoki tw'ikawusuUturindantoki tw'ikawusu

Ibikoresho

1

Ibikoresho bikenewe

9

Iki gishushanyo gikora

Thumbnail
Agateganyo

Igipande cya akriliki

Free

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

Methyl Methacrylate Syrup: Partly Polymerised below 80 °C with Hydrogen Peroxide

Methyl Methacrylate Syrup: Partly Polymerised below 80 °C with Hydrogen Peroxide

na CharlieDE

By'Inganda

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CC0 Umurenge rusange

Iyi blueprint yasohowe munsi ya CC0. Ushobora gukoporora, guhindura, gukwirakwiza no gukoresha nta kwemererwa.

Shyigikira Umuremyi ugura ibicuruzwa binyuze muri Blueprint ye Komisiyo y'Umuremyi byashyizweho n'Abacuruzi, cyangwa kora verisiyo nshya y'iyi Blueprint ukayinjiza nk'isano muri Blueprint yawe kugira ngo musangire inyungu.

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