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Tension and notch in acrylic

As many other thermoplastics notch is a problem in acrylic. Construction must therefore be without sharp internal corners, because notch combined with internal tensions easily can result in cracks during processing, transportation or the first use.
Internal tensions are common in extruded acrylic due to the manufacturing method, but tensions can also be created using the wrong tools and laser cutting.
Internal tensions can be removed with slowly heating and cooling in a oven.
In clear acrylic tensions can be seen using two pieces of Polaroid filter - Station the acrylic behind a light source, place the filters on top of each other and watch the acrylic through the filters, while the filters are rotated relative to each other. Tensions lights up.
Konstruktion til modvirkning er kærv
Constructions in acrylic to avoid notch
  Laser cutting
  The use of Acrylic
  Production of sheets and profiles
  Cast versus extruded acrylic
  Chemical resistance
  Structural properties
  Dimensional stability
  Tension and notch
  Printing on acrylic
  Acrylic versus glass
  Acrylic versus polycarbonate
  Trade names for acrylic
  Environmental impacts of acrylics

  how do I get acrylic items cheaply?
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  Where can acrylic be bought?
  Production of acrylic parts in China?
  Can individuals buy acrylic from Induflex?
  How big is the heat expansion of acrylic?

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