High-strength lightweight non-woven fabric made of spunbonded non-woven, method for the production thereof and use thereof

摘要

The invention relates to a high-strength light-weight non-woven fabric made of spunbonded non-woven, particularly for use as a reinforcement or strengthening material, comprising at least one ply of melt-spun synthetic filaments, which are bonded by means of high-energy water jets, characterized in that it includes a thermally activatable binding agent, which is applied onto the ply of melt-spun filaments in the form of at least one thin layer. The invention further relates to a method for producing such a non-woven fabric.

主权项

1. A high-strength light-weight non-woven fabric consisting of:
at least one ply of spunbonded melt-spun synthetic filaments; and a thermally activatable binding agent; wherein:
said at least one ply has been hydroentangled in the presence of said thermally activatable binding agent using high energy water jets, such that said spunbonded melt-spun synthetic fibers are hydroentangled, said binding agent is drawn into and distributed within said at least one ply, and said binding agent does not form a true surface layer on a surface of said at least one ply;cohesive bonds are present between said binding agent and said spunbonded melt-spun synthetic filaments;at least a portion of said binding agent has been thermally bonded to said spunbonded melt-spun synthetic filaments to form adhesive bonds distributed within the non-woven fabric, said adhesive bonds being relatively strong compared to said cohesive bonds;said binding agent is present in an amount ranging from greater than or equal to 7% by weight to less than 15% by weight, relative to the total weight of the non-woven fabric;said non-woven fabric exhibits a specific strength of at least 4.3 N/5 cm per g/m2 basis weight and a specific initial modulus, measured in the longitudinal direction as tension at 5% elongation, of at least 0.45 N/5 cm per g/m2 basis weight; said specific strength is defined by dividing the maximum tensile strength (in N/5 cm) of the fabric by its area density (in g/m2); and said specific initial modulus is defined by dividing the tensile strength of the fabric at 5% elongation (in N/5 cm) of the fabric by its area density (in g/m2).