功能性護膝製程技術與其性能評估

Process Technology and Performance evaluation of Functional Knee Pad

李卓勳(Cho-hsun Lee)

指導教授 ： 樓靜文

中臺科技大學/健康科學院/醫學工程暨材料研究所/碩士(2008年)

https://doi.org/10.6822/CTUST.2008.00009

摘要

隨著人類生活品質的提升，一般人對於自身的安全保護越來越重視，使得各種類型的防護用具快速地發展。本研究以一創新之材料組合改善市售護膝過於笨重且透氣不良的缺點。藉由PLA非織物基布與TPU蜂巢式氣墊的組成，製作一護膝用之抗衝擊層，結合非織物的低製作成本與蜂巢式氣墊的良好彈性以達到改善市售護膝缺點的目的。
本研究從PLA非織物基布的強力進行探討，並評估TPU蜂巢式氣墊之疊層模式所帶來的抗衝擊性能。利用低熔點纖維的添加，控制PLA非織物基布之熱固結點的數量，最後再將PLA非織物基布與TPU蜂巢式氣墊進行疊合，使用落重式衝擊測試以評估護膝緩衝基材之抗衝擊性能。
由實驗結果得知，不同厚度之TPU蜂巢式氣墊的疊層變化方式對於護膝緩衝材的抗衝擊性能有明顯的影響，以2/8/10 mm的疊層方式可於25 J之落重式衝擊測試下得到最佳的抗衝擊性能2932 N，PLA/TPU蜂巢式氣墊複合緩衝材料更可達到最佳2516 N的抗衝擊性能。PLA非織物基布的複合增加了護膝緩衝基材的抗衝擊性質，整體而言PLA非織物基布以30 %低熔點纖維含量可得到最佳的機械性質。
本研究所研發之功能性護膝緩衝材料在透濕度評估結果較市售護膝表現優異，將可改善市售護膝的悶熱感，並可達到EN 14120:2003標準中Level 2中Range C的衝擊防護標準。

關鍵字

緩衝 ； 落重式衝擊 ； 蜂巢式氣墊 ； 非織物 ； 熱塑性聚氨基甲酸酯 ； 聚乳酸纖維

並列摘要

With the improvement of human’s living standard, people pay more attention on safety which leads to a rapid development in a variable protection products. Innovative materials and those materials’ combination were used in this study in order to improve the problems of traditional knee pad, and the problems are mainly ventilation and heaviness. In this study, PLA nonwoven (PLA) and Thermoplastic Polyurethane (TPU) honeycomb air cushion (TPU-HAC) were used to create an impact resistance layer of the functional knee pad and this study also utilizes the combination of low producing cost of nonwoven and the flexibility of honeycomb air cushion to improve the quality of functional knee pad sold in the market.
This study focus on the strength of PLA nonwovens and the impact resistance of TPU honeycomb air pad. The PLA fibers and low-melting-point PLA fibers were used as raw materials to create PLA nonwoven fabric. The PLA fibers and low-melting-point PLA fibers were mixed at weight ratios of (10%, 20%, 30%, 40%, 50%). PLA nonwoven fabric and TPU-HAC materials were combined in a sandwich structure for impact protection. Impact resistance was assessed using a falling- weight impact-resistance machine.
Experimental findings indicate that impact resistance of the sandwich structure of the TPU-HAC materials improved by various layers change. TPU-HAC layer 2/8/10 mm is the optimum parameter on impact resistance. In 25 J falling-weight impact testing, TPU-HAC layer 2/8/10 can get impact resistance 2932 N; PLA/TPU-HAC composite can get best impact resistance 2516 N. PLA nonwoven can have best mechanical properties while low-melting-point PLA fibers weight ratios 30%.
The functional knee pad introduced in this study, successfully improve the problem of traditional functional knee pad sold in the market, especially the problem of ventilation and heaviness. In addition, it also achieves EN 14120:2003, Level 2, Range C impact resistance standard.

並列關鍵字

Polylactic Acid (PLA) ； Thermoplastic Polyurethane (TPU) ； nonwoven ； honeycomb air cushion ； falling weight impact resistance

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