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・ Cassà de la Selva
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Cast acrylic
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Cast acrylic : ウィキペディア英語版
Cast acrylic

A type of making acrylic when single sheets are made by pressing the liquid plastic between pieces of a mold, often made of glass, which is then taken through a gradual heating process.
== Advantages ==

It has better thermal stability, higher resistance to crazing (when a network of very small cracks form) when exposed to solvents, wider thermoforming range than extruded acrylic. Cast acrylic has better ability to be reworked hot and it is known for its superior surface finish and optical properties. Also cast acrylic is more scratch resistant than extruded acrylic.
Cast acrylic is also preferred over extruded in applications that require maching, such as turning on Engine Lathe or milling/drilling. Extruded acrylic, with far less thermal stability, tends to melt and clog cutting tools. Even with slow speeds and lots of coolant, extruded acrylic does not produce the surface finish and tight tolerances achievable with cast acrylic.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Cast acrylic」の詳細全文を読む



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