Nonwoven mat, method for production thereof and fibre composite

A non-woven mat as half-stuff comprising a first fibre made of a thermoplast with a fibre length of between 0.1 mm to 30 mm and having a weight proportion of 30% to 90%, and a reinforcing fibre with a fibre length of 0.1 mm to 30 mm, the temperature stability of the reinforcing fibre being greater than that of the first fibre and having a weight proportion of 70% to 10%, the first fibre and the reinforcing fibre being bonded merely at the intersection or contact points with 1% to 10% by weight of a binder, the weight proportions being relative to the entire formulation of the non-woven mat, the fiber length of the first fibre being smaller that that of the reinforcing fibre, the non-woven mat having a weight of between 8 g/m2 and 400 g/m2.

A method for producing a non-woven mat composed of a first fibre made of a thermoplast with a fibre length of between 0.1 mm to 30 mm and having a weight proportion of 30% to 90%, and a reinforcing fibre with a fibre length of 0.1 mm to 30 mm, the temperature stability of the reinforcing fibre being greater than that of the first fibre and having a weight proportion of 70% to 10%, the first fibre and the reinforcing fibre being bonded merely at the intersection or contact points with 1% to 10% by weight of a binder, the weight proportions being relative to the entire formulation of the non-woven mat, the fiber length of the first fibre being smaller that that of the reinforcing fibre, the non-woven mat having a weight of between 8 g/m2 and 400 g/m2, the method comprising the steps of:

• dispersing said first fibre and said reinforcing fibre in a dispersion medium, filtering the fibre containing dispersion medium through a diagonally running wire belt to form a filtrate, compacting the filtrate to form a web, drying the web, and adding said binder to either the dispersion medium or to the filtrate.

A fibre composite produced from a half-stuff non-woven mat, the mat comprising a fibre matrix made of a thermoplast with a fibre length of between 0.1 mm to 30 mm and having a weight proportion of 30% to 90%, and a reinforcing fibre with a fibre length of 0.1 mm to 30 mm, the temperature stability of the reinforcing fibre being greater than that of the first fibre and having a weight proportion of 70% to 10%, the first fibre and the reinforcing fibre being bonded merely at the intersection or contact points with 1% to 10% by weight of a binder, the weight proportions being relative to the entire formulation of the non-woven mat, the fiber length of the first fibre being smaller that that of the reinforcing fibre, the non-woven mat having a weight of between 8 g/m2 and 400 g/m2, the fibre composite containing 30% to 90% by weight of a reinforcing fibre with a fibre length of 0.1 mm to 30 mm, the reinforcing fibre being oriented anisotropically in the composite matrix, the composite having a density of 0.25 g/cm3 to 6 g/cm3.