| Summary: | 碩士 === 國立臺北科技大學 === 有機高分子研究所 === 90 === Polyurethane (PU) has been applied widely since the 19th century for its low cost and easy allocates to fabricate either softy and tough elastomers or high hardness and abrasion-resistant rigid materials. Although UV-cut additives could make PU have effective UV protection, the effects decrease with aging and projecting sunlight. Besides, there are no relevant reports till now about the electrostatic protection effect for such materials. Therefore, the feasible study of the blend for the PU with UV cut and electrostatic protection were investigated in this thesis.
The main purpose of this paper is to study the manufacture of PU products with UV-cut and anti-electrostatic effects by polymer blend method. A fixed amount of metallic micro-powder was added into the polyurethane (PU) solution and polymer blend method was applied to make such powder (about 0.5~15μm) blended uniformly with PU. This process would improve the conventional PU products to obtain the UV-cut and conductive properties. The superior UV cut and electrostatic resistance properties of the PU can not decay by the time.
From the experimental results showed that the better UV-cut, anti-electrostatic, electrostatic discharge, anti-bacteria effects were occurred in PU with SSA conductive powder. It showed that the half-life of electrostatic discharge for such products were less than one second, which is remarkable to cope with the requirement of JIS L1094 A or CNS 8312 L3148 for less than sixty seconds. Otherwise, the UPF value obtained according to AS/NZS 4399 Appendix A-1966 for such products reached the excellent level of 40~50 and over. There is 10-35% improvement in breaking tensile strength has been achieved. Therefore, it can be applied to any items where the electrostatic protection or UV-cut is necessary. In addition, these products are conductive and are with anti-stink, anti-bacteria and anti-infrared effects. This makes it to be a versatile application PU product.
The PU has been used as raw material to manufacture a lot of commercial products. Most of them, such as sun-light shield, umbrella, overall, coat, curtain, synthetic leather, artificial leather and functional clothes etc.; are either exposes to UV rays or requisite to have the electrostatic protection effect during their application. In those days, people’s living standard is getting higher and higher, also stronger and stronger is the awareness of skin care and health care. In order to avoid the hurt of skin from UV rays; to overcome the influence of dust on human health, the development of conductive PU products with UV-Cut effect would be of originality and necessity.
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