Home Composites Resin Matrix Systems Polyester Resins

Polyester Resins

Polyester resin is most commonly reinforced with glass fibre to produce a material which provides ease of handling, low cost, and dimensional stability. It is the least expensive of the resin options.

79-141°C

Max Temperature

1.1-1.2

Density grams/cc

3-13 ksi

Tensile Strength

Polyester Resins

It can be used in applications ranging from sleek automotive body panels to rugged floor or wall panels. It is particularly well suited to kitchens, bathrooms, and other areas that require washable low-maintenance walls. Its low density makes it up to five times lighter than equivalent metal parts and its strength to weight ratio is very good.

The composite's strength can be increased or decreased by altering the proportion of reinforcement. Fillers may also be added to extend the value of the resin, reducing the cost of the final composite by as much as 50 percent.

Advantages

Least expensive option
Can be tailored to meet a wide range of end-use applications

Limitations

Only moderate mechanical properties
High styrene emissions in open moulds
High cure shrinkage
Limited range of working times

Processing Technologies

Technical Details
Maximum use temperature79 - 141 °C
Flexural strength8 - 23 ksi
Flexural modulus0.5 - 0.6 Msi
Tensile strength3 - 13 ksi
Tensile modulus0.3 - 0.6 Msi
Density1.1 - 1.2 grams/cc
Moisture absorption0.15 - 0.60 %
Elongation1.4 - 4.0 %

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