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Vacuum Forming Material Specification

To help you select vacuum forming plastics for your needs, the most common vacuum forming materials available & their specs are listed below, all of which we can vacuum form for you. Our vacuum forming material selection guide may also be of help to you.

 

General vacuum forming material specs - when in sheet form
ABS = Acrylonitrile Butadiene Styrene   ABS FR = ABS Fire Retardent   HDPE = High Density Polyethylene   HIPS = High Impact Polystyrene
HDPE Cond. = HDPE Conductive   HIPS Cond. = HIPS Conductive   PP = Polypropylene   PVC = Polyvinyl Chloride
CHIPS = HIPS Clear   HIPS UVS = HIPS Ultra Violet Stable   PETG = Polyethyleneterephthalate Glycol

specs ABS ABS FR HDPE HIPS
Density (specific gravity) 1.08 g/cm³ 1.24 g/cm³ 0.96 g/cm³ 1.06 g/cm³
Izod notched impact strength @ 23°c 400 - 420 j/m 160 - 200 j/m 16 kj/m² 15.0 kj/m²
Izod notched impact strength @ -20°c 230 - 280 j/m 60 - 70 j/m DNS DNS
Vicat softening temperature 97 - 101°c 88 - 92°c 125°c 97°c
Heat deflection temperature 80 - 84°c 76 - 80°c 90°c 75 - 78°c
Tensile strength 30 - 40 MPa 40 - 45 MPa 23 N/mm² 20 MPa
Flexural modulus 2.0 - 2.2 GPa 2.0 - 2.5 GPa DNS 1.7 - 1.8 GPa
Flammability rating HB UL94 V0 HB HB
Forming Temperature 140 - 190°c 140 - 190°c 145 - 160°c 120 - 140°c
Melt flow index 6.0 g/10min 22.0 g/10min 0.4 - 1.0 g/10min 4.5 g/10min
Mould shrinkage (linear) 0.4 - 0.7% 0.5 - 0.7% 2.0 - 3.5% 0.4 - 0.7%
specs HDPE Cond. HIPS Cond. PP PVC
Density (specific gravity) 1.04 g/cm³ 1.13 g/cm³ 0.91 g/cm³ 1.37 g/cm³
Izod notched impact strength @ 23°c 27 kj/m² 10 kj/m² 40 kj/m² DNS
Izod notched impact strength @ -20°c 13 kj/m² 2 kj/m² DNS DNS
Vicat softening temperature 127°c 93°c 70°c 70 - 76°c
Heat deflection temperature 56°c 81°c 80°c 67°c
Tensile strength 29 MPa 20 MPa 29 - 31 N/mm 51 - 55 N/mm²
Flexural modulus 820 MPa 2100 MPa 25-27 N/mm² DNS
Flammability rating HB HB HB Class 1
Forming Temperature DNS DNS 155 - 175°c 110 - 190°c
Melt flow index 6 g/10 min-1 DNS 0.3 - 1.0 g/10min DNS
Mould shrinkage (linear) 1.4 - 1.6% DNS 1.5 - 2.0% 0.4 - 0.7%
Volume resistivity ≤ 10³ ≤ 10³ NA NA
Surface resistivity ≤ 104 ≤ 104 NA NA
Hardness shore A/D 98 / 65 99 / 73 DNS DNS
specs CHIPS HIPS UVS PETG (@3mm) KEY & NOTES
Density (specific gravity) 1.03 g/cm³ 1.02 g/cm³ 1.27 g/cm³ These material
specs should be
used as a guide.

DNS = Data Not
Supplied by
material supplier
Izod notched impact strength 2.3 j/m 120 j/m 88 j/m
Vicat softening temperature 90°c 97°c 83°c
Heat deflection temperature 71°c DNS 74°c
Tensile strength 26.4 MPa 23 MPa 26 MPa @break
Flexural strength 63 MPa 32 MPa 77 MPa
Falling dart impact strength DNS 50.5 j DNS
Flammability rating DNS DNS HB (V2>3.2mm)