Abstract:
THE OBJECT OF THIS INVENTION IS TO PROVIDE A HIGH PERFORMANCE POLISHING CLOTH HAVING A DENSIFIED SURFACE STATE WITH ULTRAFINE FIBER BUNDLES UNIFORMLY DISPERSED THEREIN AND HAVING EXCELLENT SMOOTHNESS, WHICH COULD NOT BE ACHIEVED BY THE CONVENTIONAL POLISHING CLOTH COMPRISING ULTRAFINE FIBERS. THE POLISHING CLOTH OF THIS INVENTION COMPRISES A NONWOVEN FABRIC FORMED BY ENTANGLING THE ULTRAFINE FIBER BUNDLES FORMED BY BUNDLING ULTRAFINE FIBERS WITH AN AVERAGE SINGLE FIBER DIAMETER OF 0.05 TO 2.0 URN AND A POLYMERIC ELASTIC MATERIAL, WHEREIN THE AVERAGE SIZE OF THE SURFACE FIBER-NAPPED PORTIONS CONSTITUTED BY THE AFOREMENTIONED ULTRAFINE FIBER BUNDLES OF THE AFOREMENTIONED NONWOVEN FABRIC IN THE WIDTH DIRECTION OF THE ULTRAFINE FIBER BUNDLES IS 50 TO 180 µM. [SELECTED DRAWING3
Abstract:
The object of this invention is to provide a high performance polishing cloth having a densified surface state with ultrafine fiber bundles uniformly dispersed therein and having excellent smoothness, which could not be achieved by the conventional polishing cloth comprising ultrafine fibers.The polishing cloth of this invention comprises a nonwoven fabric formed by entangling the ultrafine fiber bundles formed by bundling ultrafine fibers with an average single fiber diameter of 0.05 to 2.0 µm and a polymeric elastic material, wherein the average size of the surface fiber-napped portions constituted by the aforementioned ultrafine fiber bundles of the aforementioned nonwoven fabric in the width direction of the ultrafine fiber bundles is 50 to 180 µm.[Selected drawing] Fig. 1
Abstract:
The present invention provides a conjugated fiber suitable for use as a crimped fiber capable of producing an artificial leather having highly dense texture and good quality. The present invention also provides a base body for an artificial leather and an artificial leather produced by using such conjugated fiber. The conjugated fiber of the present invention is a conjugated fiber comprising a readily soluble polyester component and a less readily soluble component, and the readily soluble polyester component comprises a copolymerized polyester having 5 to 10% by mole of 5-sodium sulfoisophthalate copolymerized therewith and the readily soluble polyester component contains a polyalkylene glycol. The polyalkylene glycol is in the form of streaks extending in longitudinal direction of the fiber in the longitudinal cross section of the conjugated fiber.
Abstract:
[Problem] The present invention provides artificial leather including an entangled fiber mass of ultrafine fibers and a polymeric elastomer and having a wet feel and an elegant consistent appearance similar to those of natural nubuck leather, and also provides a production method therefor. [Means of solution] Accordingly, the artificial leather of the present invention is an artificial leather including an entangled fiber mass of ultrafine fibers having a monofilament fineness of 0.01 dtex or more and 0.50 dtex or less and a polymeric elastomer; wherein at least one surface is napped; the cross-sectional profile curve of the napped surface has an arithmetic mean height Pa of 26 µm or more and 100 µm or less; the arithmetic mean height Pa of the cross-sectional profile curve of the opposite surface is 20% or more and 80% or less of the cross-sectional roughness Pa of the napped side; the existence frequency of asperity peaks found in the cross-sectional profile curve of the napped surface is 1.8 or more and 20 or less per 1.0 mm; and a woven or knitted fabric lamination is present near the opposite surface at a depth position of 10% or more and 50% or less.
Abstract:
The present invention provides sheet material having good mechanical properties, flexibility, lightweight properties, and quality, and also relates to a production method therefor. The sheet material according to the present invention is one that includes, as constitutional components, an elastic polymer and nonwoven fabric composed mainly of ultrafine hollow fiber with an average monofilament diameter in the range of 0.05 to 10 µm, the ultrafine hollow fiber containing 2 to 60 hollows.
Abstract:
Provided is a base body for an artificial leather comprising a polyester excellent in thermostability during melt molding. That is, provided is a conjugated fiber comprising a polyester which exhibits only a small reduction in intrinsic viscosity during melt molding. The base body for an artificial leather comprises an intertwined fiber body mainly comprising an ultrafine fiber having a 0.01 to 10 µm fiber diameter and an elastic polymer, the ultrafine fiber comprising, as a constituent polymer, a polyester obtained from a dicarboxylic acid and/or an ester-forming derivative thereof, and a diol, the polyester containing 15 to 500 ppm of a 1,2-propanediol-derived component.