Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Study of NCO Index and Ripening Condition on Physicochemical Properties of Solvent-less Polyurethane Formulations

NCO 지수와 숙성 조건에 따른 무용제형 폴리우레탄 인조피혁의 물리 화학적 특성에 관한 연구

  • Eun, Jong Hyun (Department of Fiber System Engineering, Yeungnam University) ;
  • Lee, Joon Seok (Department of Fiber System Engineering, Yeungnam University) ;
  • Yoo, Ho Wook (Textile for Life, Ltd.) ;
  • Bae, Han Jo (Department of Fashion Material, Korea Polytechnic)
  • 은종현 (영남대학교 파이버시스템공학과) ;
  • 이준석 (영남대학교 파이버시스템공학과) ;
  • 유호욱 ((주)T4L) ;
  • 배한조 (한국폴리텍대학 섬유패션캠퍼스 패션소재과)
  • Received : 2019.02.08
  • Accepted : 2019.04.20
  • Published : 2019.04.30
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Abstract

In this study, we investigated the chemical and physical properties of polyurethane artificial leather. Polyurethane artificial leather was prepared from polyol, diisocyanate, a chain extender, a catalyst, and nylon circular knit fabric. After manufacturing the artificial leather, the properties of six different samples were investigated according to their NCO index and ripening temperature. The equivalence ratios of the isocyanates (NCO) to polyols containing a hydroxyl group are referred to as the NCO index. Samples with an NCO index of 1.0, 1.4, and 1.8 were synthesized by changing the weight ratio of diisocyanate. Polyurethane artificial leathers were synthesized by varying the ripening temperature at room temperature and $60^{\circ}C$. As the NCO index increased, the number of unreacted NCO functional groups increased, thereby improving the physical properties of polyurethane artificial leathers. When the samples were prepared at a ripening temperature of $60^{\circ}C$, the surface of the polyurethane artificial leather changed, and the physical properties improved.

Keywords

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