• 한국의류산업학회지
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• 제5권3호
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• pp.299-303
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• 2003

Some of historical textiles were analyzed to identify the imprinted textures on the metal remains of Haengyeup(a horse strap pendant) and Doja (a knife), which were excavated in the ruins of Hwangsung-dong, Kyungju city in the fifth century and textiles imprinted on the human bones that were excavated in the Pungnae 4th Area, Namyangju county in the sixteenth century. The results analyzed arc as follows ; It was confirmed that the imprinted textures of Haengyeup and Doja are white ramie since the structural characteristics of cellulosic bast fibers, partially projected long oval cross sections with large lumens and the imprinted textures of human bones are silk fabrics since the triangular cross sections of fibroin is showed. All of the textiles were designed in plain weaves. In the case of weaving yarns, the warp threads were thicker than the weft threads, that is, the imprinted textures of Haengyeup were measured by 1.35 mm for warp and 1.21 mm for weft, and the Doja by 1.16mm for warp and 1.11 mm for weft. In connection with the direction of the yarn twist, the Z-twist were observed in the imprinted textures of human bones, whereas it presented the S-twist in the case of Haengyeup and Doja. The warp yarns were mostly harder twisted than the weft yarns on the amounts of twist, that is, it was observed that the case of Haengyeup were amounted to 0.33 twists per centimeter for warp yarns and 0.25 twists per centimeter for weft yarns. Also it was showed 0.32 twists per centimeter for warp yarns and 0.26 twists per centimeter in the case of the textures of human bones. On the fabric counts, it was showed that the finer the yarns the higher the densities since it were $4.3{\times}5.1$ threads per sqaure centimeters and $7.6{\times}7.1$ threads per sqaure centimeters each in the case of Haengyeup and Doja, whereas it was $18.2{\times}33.7$ threads per sqaure centimeters in the case of the textures of human bones.

• Elastomers and Composites
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• 제1권1호
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• pp.49-55
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• 1966

Based upon the results of the previous work, the experiments are concentrated on the improvement of the durability of rubber coated fabrics as a rain garment material. To obtain a much lighter and durable coated fabric, several kinds of light weight cotton prints having almost equal density in warp and fillingwise were chosen. Rubber coating on these prints was made by topping and spreading process using rubber compound of various viscosity, and the physical properties of final product were analysed and interpreted in terms of adhesion and durability. The results are as follows. 1. Any noticeable difference between two coating processes was not found in terms of physical properties. 2. Base fabrics should be dipped once into a dilute rubber compound before coating operation in order to obtain a uniform adhesion and physical properties, and the optimum range of the viscosity of dipping paste are from 100 poise to 200 poise. 3. Generally, the tearing strength of the coated fabrics is inversely proportional to the adhesion. 4. It was assumed that the increase of the water proofness after water immersion on the finished material which have dense base fabric is chiefly due to the swelling of the cellulosic fiber.

• 한국포장학회지
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• 제1권1호
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• pp.51-61
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• 1995

This paper is discussed on the prospects of packaging industry and technologies of Japan for comming 21th century. It is clear that packaging industry depends on living style and social mechanizms. A trends of numerical consumption, amounts of money and composisition of packaging materials are one of a measure of development of packaging industry. Total consumption of packaging materials in Japan of 1965, 1980 and 1993 were $6,344.5{\times}10^3,\;15,898.7{\times}10^3\;and\;21,603.3{\times}10^3$ tons respectively and also, shipping money of packaging materials were $7,073{\times}10^{11},\;45,421{\times}10^{11}\;and\;63,902{\times}10^{11}$ yen, respectively. It is estimated from these data that the packaging industry is also increasing in future according of GNP of country. Compositions of packaging materials from 1965 to 1993, however, are somewhat changing according to development of new materials or social conditions such as platics packaging or wooden packaging materials. Technical forcasts of packaging industry are shown from view point of national living style, energy and resorces as well as environment of world based on forcasting committee of pulp & paper in Japan, report of research committee for the 21th packaging in JPI and materials of symposium in Kanagawa University in this paper. As a my conclusion, many functional packaging materials shall be developed in the future and accordingly Life Cycle Assesment plays a important role of packaging fields. Furthermore, I am estimating in future the new cellulosic materials such as nonwood fiber resources instead of paper, board, wooden containers and a part of plastic packaging materials shall be developed. This paper is constructed by three items as follow:

• 공업화학
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• 제5권2호
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• pp.345-356
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• 1994

내구유연발수제를 제조할 목적으로 전보에서 합성한 poly(OMA-co-DAMA)[PODC], poly(DMA-co-DAMA)[PDDC], poly(EMA-co-DAMA)[PEDC] 각각의 양이온화물, 본 실험에서 합성한 지방산 카르바미드의 양이온화물(ODTCC), 왁스류 및 유화제들을 블렌드시켜 발수제 PODCW, PDDCW, PEDCW를 각각 제조하였다. 발수제 PODCW, PDDCW, PEDCW 각각을 면직물에 단독 및 수지병용으로 처리하여 내세탁성, 인열강도, 방추도 및 접촉각 등을 측정해 본 결과, 물성의 향상을 가져왔다. 그러나 발수도는 PODCW의 경우 80 정도로 사용 가능하였으나, PDDCW와 PEDCW의 발수도는 현저히 저하되었다. 제조된 발수제의 적정 열경화온도는 $140^{\circ}C$, 적정 사용농도는 3wt%이었고, 사용된 발수제용 촉매 중 아세트산나트륨이 가장 좋았으며, 촉매의 사용농도는 0.6wt%가 적당하였다. 또한 발수제와 셀룰로오스 섬유화의 반응메카니즘을 규명하고 내세탁성 결과치를 검토한 결과, 제조된 발수제가 내구성 발수제임을 입증하였으며, SEM으로 발수처리된 면직물의 표면구조를 관찰하였다.