용융압출에 의한 통기성 우의 및 작업복의 개발 = The Development of the Porous Permeable Rain Coat and Working Clothes by the Melt Extrution

다국어 초록 (Multilingual Abstract)

An porous permeable rain coat and working clothes are prepared by the melt extrution of a porous permeable composition. The porous permeable coposition was constituted the low density polyethylene of 4.0 to 2.owt%, LLDPE of 32 to 50wt%, CaCO3 of 40 to 60wt%, TiO2 of 1.3 to 2.0wt%, CaO of 0.7 to 1.lwt%, Ca-stearate of 0.2 to 0.5wt%, EVA of 1.3 to 2.0wt%, and antioxydant of 0.13 to 0.2wt%.
The composition are multifariously kneaded and melt extruded by a know single- or twin-screw extruder. Use of a twin-screw extruder is preferred in view of high extrution rate, extrution stability and mixing intensity. Melt extrusion was usually carried out at a temperature of 160 to 170℃, and a speed of revolution of 90 to 180RPM to form a film or sheet having 40 to 300㎛ in thickness.
As a result, The porous permeability was improved with increasing the content of CaCO3. but, the flexibility of the film became worse with increasing of CaCO3. The optimum condition of the composition for the production of rain coat and working clothes in this experiments was LLDPE-37.2wt%, LDPE-4.6wt%, CaCO3-53.8wt%, TiO2-1.5wt%, CaO-0.8wt%, Calsium stearate-0.3wt%, EVA-1.5wt%, and antioxydant-0.l5wt%.

목차 (Table of Contents)

• 1.서론
• 2.시약, 장치 및 방법
• (1) 시약 및 장치
• (2) 실험방법
• 3.실험결과 및 고찰
• 4.결론