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Reinforcement

The choice of reinforcement is important for the properties of the profile, including mechanical properties such as strength and stiffness.

The choice of reinforcement is important for the properties of the profile, including mechanical properties such as strength and stiffness.

The orientation of the reinforcement is also of great importance to the properties of finished products as regards load-carrying capacity.

Profiles manufactured by Fiberline Composites are a combination of various types of roving and different types of complex weaves and mats.

Structural profiles are for example often subjected to loads that are transversal to the length of the profile (i.e. transversal to the direction of pultrusion), and these profiles must often be capable of resisting pull-out loads from bolts etc.

Not only unidirectional roving is therefore used, but also roving in which some of the fibres are oriented transversely. In addition, mats and weaves with different fibre orientations are used. Mats and weaves with fibre orientations of between 45° and 90° contribute primarily to improving bolt pull-out strength and mechanical properties in the transverse direction.

The combination of roving and mats can be tailored to the requirements made to the individual profile based on the needs of the customer.

Types of roving

Unidirectional

Spun

Mock


Types of mat

Continuous mat random fibre orientation

Weave 0º/90º

Complex mat 0º/90º weave + random fibre orientation


Bidirectional complex mat 0º/±45º/90º weave + random fibre orientation

Multiax mat 0º/±45º

Specially developed mat
based on specific requirement

If a profile is to be located in a corrosive environment an “surfacing veil” is used. This can be thin fibreglass matting, thin thermoplastic polyester matting or acrylic matting which is placed on the entire profile surface to protect the glass fibres against corrosion and subsequent deterioration of the mechanical properties of the profile.

The pultrusion process necessitates that a certain number of the fibres be oriented in the direction of pultrusion, but the reinforcement can otherwise be structured in innumerable ways depending upon the load.