Pultruded Profile Properties

Fibre reinforced plastic profiles

The Pultrusion process is a method of continuously manufacturing Fibre Reinforced Plastic profiles of high strength and stiffness. Many different reinforcements and matrix systems can be used, but standard constructions usually consist of glass and polyester resins.

Flexural Properties

The values quoted below have been determined on test coupons cut from profiles produced using glass as reinforcement and an unsaturated polyester resin cured at elevated temperature as the matrix system.

The test method used was a 3-point flexural bend test using a 16 to 1 span to depth ratio corresponding to BS2782-304 and ATSM D-790.

Pultruded profiles normally exhibit a high degree of anisotropy so that the orientation of the test samples is very important.  The angle formed between the test piece geometry and the unidirectional fibre component is referred as the sample orientation.

Standard construction is either all-unidirectional E glass roving at 58% by volume glass content or a unidirectional E glass-roving core with 450 gsm Continuous Filament Mat (CFM) on each face giving a total of 38% by volume glass content.

Table 1 : Variation in flexural strength with angle of test

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Table 2 : Variation in flexural modulus with angle of test

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Table 3: Variation in flexural properties with thickness

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Comparison of Properties

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Specific property comparison

The specific property is defined as the property divided by the density.  It gives a good indication of the frequency of supports required for a suspended structure or the overall weight of a structure to meet defined criteria.

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pdf Click Here to download a Pultrex document (PDF) illustrating Standard tolerances for Pultruded Profiles