Abstract: The invention is aimed to provide a core-sheath type composite filament, in which a functional component is hardly lost due to volatilization during the melt forming; bleeding of the internally added functional component is effectively inhibited; the internally added functional component does not adversely affect spinning properties, stretching properties, strength and dimensional stability; the use of the functional component can be greatly reduced, leading to a reduction of production cost; superior functionalities of deodorizing properties and antimicrobial properties can be exhibited to a maximum extent; even when contacting with water, the functionalities can be kept over a long time; and the composite filament is highly safe to a human body. The invention is also aimed to provide a process for the production of the core-sheath type composite filament as well as a heat fused article obtained from the composite filament.

Abstract: A backing for tufted carpets, having improved tufting properties such as a small penetration resistance to tufting needles, a uniform distribution of values of penetration resistance and yet superior intrinsic properties, and a tufted carpet produced from the backing are provided, which backing is produced by weaving polypropylene tape yarns oriented by stretching, these polypropylene tape yarns comprising foamed polypropylene tape yarns having a foam content of 1.0 to 20%.