• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.4
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• pp.541-550
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• 1999

The purpose of this study is to find out the factors that explain the sense of touch and preference of man-made leather. Date base of descriptors for man-made leather was collected by interviewing 50 consumers, 33 different kinds of commercial man-made leathers(synthetic leather and artificial leather) were assessed subjectively by 605 consumers using the 9-point scale of 34 pairs of bipolar descriptors based on the data base. Subjective ratings were analyzed by principal axis factoring with varimax rota-tion. The sense of touch of man-made leather is explained by five factors ; surface property stretchiness thickness& weight thermal property(warmth & coolness) and moisture property (sticky & clingy). The difference in the sense of touch of man-made leathers is mainly attributable to surface property and stretchiness. And the preference of man-made leathers is mainly attributable to surface property and stretchiness. And the preference of man-made leather is explained by three factors ; surface property stretchiness and quality. Higher preference is found in man-mad leather of better quality touch and softness.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2008.04a
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• pp.22-24
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• 2008

신발 및 피혁 제품의 분쇄는 섬유의 길이와 물리적인 특성을 고려하여 3${\sim}$4mm 정도의 섬유 길이로 절단되는 Niagara beater가 우수하였고, 섬유간 접착력을 부여하는 Binder 물질로는 NR latex와 EVA emulsion이 인장, 인열강도가 우수하여 NR latex와 EVA emulsion이 7:3의 비율로 혼합하여 사용하는 것이 가장 좋은 결과를 나타내었다. 또한 코팅 처리된 신발 재단 폐기물의 경우 Niagara beater에 Alcalase를 투입하는 것이 분쇄시간의 단축에 유리한 경향을 나타내었고, 건조 공정은 90$^{\circ}C$이하로 유지하는 것이 $^{\triangle}$E값의 변화가 거의 없었고 100$^{\circ}C$에서는 $^{\triangle}$E값이 7.55를 나타내어 황변이 발생하였다.

• 한국생물공학회:학술대회논문집
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• 2000.11a
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• pp.163-166
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• 2000

Hydrogen sulfide, ammonia and benzene which are generated from natural leather industry were simultaneously removed using biofilter including benzene degrading microbial consortia and sulfur oxidizer Thiobacillus sp.IW. The removal efficiency of benzene was maintained 90% in average for single and mixed gas treatment and that of ammonia was 99%, whereas at of hydrogen sulfide was relatively lower 85%.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2003.11b
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• pp.373-376
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• 2003

본 연 구에서 얻어진 결과 제조업체별 수집한 합성피혁, 섬유, 플라스틱, 폴리우레탄, 실리콘수지등의 MBT, DBT의 농도는 대략 0 - 1000 ${\mu}g$/kg 정도의 분포를 나타내었고 TBT는 0-500 ${\mu}g$/kg 정도의 분포를 나타내었다. 그리고 전체적으로 합성피혁, 실리콘수지, 플라스틱 & 폴리우레탄, 천 등의 순으로 높게 검출 되었다. 이결과는 우리가 현재 가장 밀접하게 접하고 있는 신발, 스포츠의류, 가죽의류 등의 제품에서 유기주석 화합물의 인체에 미치는 유해성 대해서는 선진국에서 규제하는 수준에는 부합된다는 것을 보여준다. 갈수록 선진국에서 환경인증에 대 한 요구를 강화함에 따라 국제적 환경인증 마크인 ‘에코텍스 스텐더드(Oeko-tex standard) 100’ 에서는 다음과 같이 규제하고 있다. TBT, DBT의 두 화합물로 기준치는 TBT의 경우, Product Class I은 0.5 ppm. II, III, IV의 경우는 1.0 ppm이며, DBT 는 Product Class I(유아용) 에만 해당하고 1.0 ppm이다. 우리나라도 대부분의 선진국처럼 유기 주석 화합물의 사용을 적극 억제하는 등 법적인 장치 가 마련돼야 한다고 여겨진다. 또한 유독성의 유기주석 촉매 대체물질로서 환경 친화형인 즉, MBT, DBT, TBT가 전혀 함유되지 않은 무독성의 유기금속촉매를 개발하는데 노력을 기울여 야 할 것이다.

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.2
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• pp.277-285
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• 2000

The purpose of this study was to quantify the relationship between the sense of touch and mechanical properties of man-made leather. The first was to develop the five conversion equations which convert mechanical properties of man-made leather into five factor scores, which express five factors of the sense of touch(surface property, stretchiness, thickness & weight, thermal property(warmth & coolness), and moisture property(sticky & clingy)). The second was to develop the conversion equation which converts five factor scores into score of the sense of touch. Five factor scores were predicted by the following mechanical properties; surface property factor by log2HB and (log2HB)2, stretchiness factor by logEM, thickness & weight factor by logT, log2HB, logW, thermal property factor by logT, logHB, logSMd, and moisture property factor by logMMD, RC, RC2, (logEM)2, RT2. Subsequently, these five factor scores were converted into score of the sense of touch. The predictive abilities of the developed equations were satisfied.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2000.05a
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• pp.132-133
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• 2000

• The Science & Technology
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• v.17 no.8 s.183
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• pp.45-47
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• 1984

고분자 휘스커 (Polymer-Whisker) / 초밀비자 (Submicron Particles) / 레이저광선이용 피혁재단 / 프랑스 특유의 컴퓨터 언어개발

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2001.05a
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• pp.62-63
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• 2001

• Journal of the Korea Organic Resources Recycling Association
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• v.4 no.1
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• pp.13-21
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• 1996

For treating tannery wastewater containing high sulfate and heavy metals, test was performed to assess their performance, competition between SRB (sulfate reducing bacteria) and MPB (methane producing bacteria), and the activity of MPB according to change of chromium concentrations. COD removal efficiency was above 70% at VLR (volumetric loading rate) of 2.0 gCOD/I.day and HRT (hydraulic retention time) of 18hrs at $35^{\circ}C$. In the competition between SRB and MPB, about 15% of the removed COD was utilized by SRB in the begining, but it became 43% at the end. It indicated that MPB was strongly suppressed by the occurrence of significant sulfate reduction since a large electron flow was uptaken by SRB. For the entire experiment, removal efficiencies of chromium concentration were more than 90%. Despite high removal efficiencies of chromium concentration, performance of reactor did not change significantly during the experimental periods. Expecially, chromium (III) is tannery wastewater is less toxic than chromium (VI).

• Journal of the Korea Organic Resources Recycling Association
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• v.9 no.3
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• pp.93-103
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• 2001

Once of recent issue in the leather industry is disposal of shaving scrap containing chromium. Shaving scrap is indispensible generated by control of the final thickness in the leather making process. It is the flesh layer of the skin consisting mainly of collagen. More recently, we have tried to improve the quality of the isolated gelatin. The purpose of this research was to extract gelatin for agricultural usage. As a result, it does not contain Cr and could obtained to a good gelatin that have more than 130,000Da. average molecular weight, more than 30 mps viscosity and more than 100g jelly strength. Gelatin that is extracted by alkaline condition expected to be available to high performance gelatin such as material of organic fertilizer(ex, Nitrogen-release fertilizer).