Processing Technique of PP/High Tenacity PET Hybrid Core Yarn Manufactured Geogrids

• Main Authors: Chien-Te Wu, 吳建德
• Other Authors: Chiu-Kung Lu
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/7tgbm9

碩士 === 逢甲大學 === 紡織工程所 === 91 === The woven type geogrids are manufactured more nowadays in Taiwan and it is short of research data and requires investigating deeply. We designed and produced a geogrids processer in this thesis. We spun the hybrid core yarn with the Twist-Warp Machine and weaved geogrids with the hybrid core yarn. The improvement and fabrication with geogrids processer was center on shedding mechanism, picking mechanism, beating mechanism, let-off mechanism, and tack-up mechanism. The results showed that the geogrids processer could manufacture geogrids successfully. The geogrids request high strength and low elongation. In this thesis, we spun hybrid core yarn with two bundles of high tenacity PET (2000 D/384 f, core) and one bundle of PP (1000 D/120 f, sheath) with the Twist-Warp Machine. The results showed that we could spin PP/high tenacity PET hybrid core yarn with twist factor down to 8.3. The strength is 323.7 N and the elongation is 13.2 % with the PP/high tenacity PET hybrid core yarn. Weaved the geogrids with the PP/ high tenacity PET hybrid core yarn that provided with high strength, low elongation and lightweight. In this thesis, the manufacture conditions, mechanical properties, acid-resisting property, base-resisting property and light and water exposure-resisting property on geogrids weaved with PP/high tenacity PET hybrid core yarn was investigated. The results showed that we could obtain the best mechanical properties with geogrids when the heating temperature was 190 ℃, heating time was 4 minutes. The longitudinal strength was 46.4 kN/m, the transverse strength was 23.6 kN/m, the junction strength was 6.2 kN/m, and the longitudinal elongation was 11.4 % of the geogrids. The strength of the geogrids didn’t reduce with the acid-resisting and base-resisting tests. The strength reduced clearly with the light and water exposure-resisting (600 hours) test.