Multilayer composite sheet useful as a substrate for artificial leather
AssigneeAsahi Kasei Kogyo Kabushiki Kaisha
InventorsKenji Nakamae, Tsukasa Shima
Life of this patent
Estimating the term…
Abstract
A multilayer composite sheet useful as a substrate for artificial leather, comprises at least three fibrous layers, namely, a superficial layer (A) consisting of a spun-laid web composed of extremely fine fibers having an average denier of 0.5 or less and three-dimensionally entangled with each other; and intermediate layer (B) consisting of a web of staple fibers having a length of 50 mm or less and entangled together; and a base layer (C) consisting of a woven or knitted fabric, the above-mentioned three fibrous layers being superimposed on each other and combined together in such a manner that a portion of the fibers in each layer penetrates into the adjacent layers and becomes entangled three-dimensionally with the fibers in the adjacent layers.
Claims5
A multilayer composite sheet useful as a substrate for artificial leather, comprising at least three fibrous layers, namely, a superficial layer (A) consisting of spun-laid extremely fine fibers having an average denier of 0.5 or less, which fine fibers are three dimensionally entangled with each other, thereby forming a body of a non-woven fibrous layer;
- an intermediate layer (B) consisting of synthetic staple fibers having a length of 50 mm or less, which staple fibers are entangled with each other to form a body of a non-woven layer;
- and a base layer (C) consisting of a woven or knitted fabric, said superficial layer (A), said intermediate layer (B) and said base layer (C) being superimposed together in the above-mentioned order and being subjected to needle-punching or water-stream-ejecting under high pressure thereby to form a composite sheet wherein a portion of the fibers in each non-woven fibrous layer penetrates into the inside of the adjacent layers and said penetrated fibers become entangled with the fibers in the adjacent layers.
Dependencies are inferred from the claim text.