Continuous filament mat

Continuous filament mats sheet of continuous filament felt with a binder. 

ISO 3616 2001 Textile glass - Chopped-strand and continuous-filament mats -Determination of average thickness, thickness under load and recovery after compression ISO 4603 1993 Textile glass - Woven fabrics - Determination of thickness ISO 4604 1978 Textile glass - Woven fabrics - Determination of conventional flexural stiffness - Fixed angle flexometer method... 

Mats chopped fibres (50 mm) are held together with a binder to form a sheet. Continuous filament mats sheets of felt of continuous filaments with a binder. Stratipregs or prepregs rovings impregnated with a resin. 

The fabric s unidirectional fibers are constructed in a way that increases resin flow during molding, and wet-out is up to 40% faster than with other products. So that molders don not have to modify their existing laminate designs, the fabrics are based on traditional knitted fabric technology and have comparable properties. Channels are built into the fabric structure to ensure a fast, even resin distribution. The faster flow rate can lead to higher production and mold turnover and because there is no need for local resin distribution media, the fabric can potentially decrease molding costs. A continuous filament mat version of the fabric is said to offer even faster surface flow. 

Railway carriage interior components molded by RTM have been developed by Kobe Steel Europe with Transintech, UK, and Compin, France. A lightweight (5 kg) seat back shell with high static load and absorption capacity is molded in a modified acrylic resin (from Ashland) with a filler combination to achieve low fire, smoke and toxicity (FST) properties (which is easy to mold by RTM, with little effect on mechanical properties). A combination of glass fiber-based fabrics of 45° non-crimp (936 g/m ) with unidirectional reinforcement and continuous filament mat (450 g/m ) is used. 

Present day developments include Lotus for production of car bodies, the female mold half is first coated with a gelcoat and dry reinforcement (mainly continuous filament mat and some woven roving) and PUR foam formers are placed on it. The foam inserts have previously been wrapped in continuous filament mat to create a stiff torsion box on each side. The inner male mold, with an airtight peripheral seal, is then placed over the loaded mold and bolted in place and resin is then drawn evenly into the mold by vacuum. 

Continuous Filament Mat (CFM)—A non-woven material similar to chopped strand mat except that the fibres are swirled at random and are continuous. 

The reinforcement used is generally a combination of uni directional roving and random mat (continuous filament mat). This combination provides a reasonably optimised set of properties in the longitudinal and the transverse directions respectively. Other reinforcement types may be used, including woven roving, chopped strand mat (nonsoluble binder), needled mat and multi-axial non-woven. 

Continuous filament mat (CFM) is the most commonly used reinforcement, but chopped strand mat (CSM) with thermo-deformable binders allows the production of preformed reinforcement shapes and is becoming more common. 

These factors dictate the type of reinforcement which can be used. Continuous filament mat and needle mat (both glass fibre) are most common, but woven roving and multi-axial (glass, carbon, etc.) can also be used. 

Reinforcement Ahlstrom multiaxial (0/90 and 45) non crimp , Ahlstrom Ml 13 chopped strand mat (CSM) Vetrotex U 812 continuous filament mat... 

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