Combo Mats for Composites and Insulation

Combo Mats for Composites and Insulation


Woven roving combo mat is a complex mat made by stitching together woven roving and a layer of distributed chopped strand base on E-glass. This type of mats combine multi directional strength of strand mat with bi-axial high strength of woven roving and is perfect for for shields and composites reinforcing.


The most common types of glass used in fibreglass is alumino-borosilicate E-glass type. The main differences between C / E-glass fibre:

Fibres diameters7 - 15 μm4 - 11 μm
SiO2 contents64-70%52-58%
Strength1800 MPa2100 MPa
Melting point750°C840°C
Density2,50 g/cm32,56 g/cm3

Production process

The process of manufacturing fibreglass is called pultrusion. The manufacturing process for glass fibres suitable for reinforcement uses large furnaces to gradually melt the silica sand, limestone, kaolin clay, dolomite and other minerals to liquid form. It is then extruded through bushings, which are bundles of very small orifices on level 5–25 micrometres. These filaments are then stretched and sized - it means coated with a chemical solution. The individual filaments are now bundled in large numbers to provide a roving.

Size specification and main properties

Type of matsMTS 600/275MTS 600/305MTS 600/450MTS 800/275MTS 800/305MTS 800/450
Combo density (g/m2)890±89920±921077±1081098±1101128±1131283±128
Fabric density (g/m2)600±60600±60600±60800±80800±80800±80
Mat density (g/m2)275±28305±31450±45275±28305±31450±45
Humidity (%)≤0,10≤0,10≤0,10≤0,10≤0,10≤0,10
Tensile strength (N/50mm)380038003800400040004000
Thickness (mm)11,11,31,21,31,5
Width (mm)1000±501000±501000±501000±501000±501000±50
Length on roll (m)565446454439


The E-glass now makes up most of the fibreglass production in the world, and also is the single largest consumer of boron minerals globally. It is susceptible to chloride ion attack but not recommended for marine applications. The combo mat is mainly use for glass-reinforced plastics as GRP application, such as: storage tanks, piping systems, house building components, corrosion proof below-ground systems, automotive and aeronautic industry.

Fibreglass composite tanks tend to be used for chemical storage because the plastic liner polypropylene and other are resistant to a wide range of corrosive chemicals in long time.