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US 10,982,382 B2Granted
Napped artificial leather dyed with cationic dye, and method for manufacturing the same
AssigneeKuraray Co., Ltd.
InventorsYasunori Murate, Hitoshi Nakatsuka
Life of this patent
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Abstract
Disclosed is a napped artificial leather dyed with a cationic dye, including: a non-woven fabric of a cationic dyeable polyester fiber having a fineness of 0.07 to 0.9 dtex; and an elastic polymer provided inside the non-woven fabric, wherein the napped artificial leather has L* value≤50, a grade of color difference determined in an evaluation of color migration to PVC under a load 0.75 kg/cm at 50° C. for 16 hours, of 4 or more, a tear strength per mm of thickness of 30 N or more, and a peel strength of 3 kg/cm or more.
Claims15
A napped artificial leather dyed with a cationic dye, comprising:
- a non-woven fabric of cationic dyeable polyester fibers having a fineness of 0.07 to 0.9 dtex;
- and an elastic polymer provided inside the non-woven fabric,
- wherein the cationic dyeable polyester fibers include a polyester containing a dicarboxylic acid unit mainly of a terephthalic acid unit and a glycol unit mainly of an ethylene glycol unit, and
- as a second dicarboxylic acid unit, 1.5 to 3 mol % of a unit represented by formula (Ia):
- and
- wherein the napped artificial leather has
- L* value≤50,
- a chlorine content of 90 ppm or less,
- a grade of color difference, determined in an evaluation of color migration to PVC under a load of 0.75 kg/cm at 50° C. for 16 hours, of 4 or more,
- a tear strength per mm of thickness of 30 N or more, and
- a peel strength of 3 kg/cm or more,
- wherein the tear strength is measured according to a method, wherein a test strip of 10 cm long by 4 cm wide is cut out from the napped artificial leather, then, a 5 cm-long cut is made at a center of a shorter side of the test strip, parallel to a longer side, then, using a tensile testing machine, a first and a second end opposite the first end of the test strip are nipped by a first and second chuck of a jig of the testing machine, and a stress-strain (s-s) curve is measured at a tensile speed of 10 cm/min.
9 more elements
Dependencies are inferred from the claim text.