a Workshop Handbook
PERSPEXª GS CAST ACRYLIC SHEET
PERSPEXª XT EXTRUDED ACRYLIC SHEET
PXTD 132 SIXTH EDITION CONTENTS PAGE
INTRODUCTION 1
PROPERTIES 1
ENGINEERING DESIGN DATA 1
BURNING BEHAVIOUR 2
MASKING PROTECTION 2
STORAGE 2
PREPARING FOR FABRICATION 3 CLEANING 3
MACHINING 3 CUTTING TOOLS 4 SAWING 4 SCRIBE-BREAKING 5 LASER CUTTING 6 DRILLING 7 SCREWING AND TAPPING 8 TURNING 8 SPINDLE MOULDING 9 ENGRAVING 9 ROUTING 9 FINISHING 11
THERMOFORMING (GENERAL) 12 METHODS OF THERMOFORMING 18 DOUBLE-CURVATURE THERMOFORMING 23 VACUUM FORMING 26
CEMENTING 28
PRINTING, PAINTING AND SURFACE DECORATION 29
STRESS 30 ANNEALING 30 NORMALISING 31
SAFETY 32
CHEMICAL RESISTANCE 33
APPENDIX 37 INTRODUCTION
PERSPEX acrylic sheet is a most useful material in the workshop because it can be used to make precision engineering components for both domestic and industrial products. Typical applications include signs, glazing, safety screening, rooflighting, furniture, lighting fittings and a great many industrial parts for the medical and chemical industries.
PERSPEX is manufactured in two forms; cell cast and extruded sheet. PERSPEX CS cell cast sheet is available in a wide range of thicknesses and colours, including blocks, colours and surface patterns. Extruded sheet, PERSPEX XT, is available as clear sheet and also in a range of opal and tinted colours and impact modified grades.
Some differences exist between cast and extruded PERSPEX properties arising from their molecular structure and this can be reflected in their fabrication behaviour. These differences are highlighted where appropriate in the handbook. Otherwise, fabrication behaviour may be assumed to be very similar for both products.
PROPERTIES OF PERSPEX